feat(group): 增加messages调度模型映射配置

backend/ent/group.go

@@ -11,6 +11,7 @@ import (
 	"entgo.io/ent"
 	"entgo.io/ent/dialect/sql"
 	"github.com/Wei-Shaw/sub2api/ent/group"
+	"github.com/Wei-Shaw/sub2api/internal/domain"
 )
 
 // Group is the model entity for the Group schema.
@@ -76,6 +77,8 @@ type Group struct {
 	RequirePrivacySet bool `json:"require_privacy_set,omitempty"`
 	// 默认映射模型 ID，当账号级映射找不到时使用此值
 	DefaultMappedModel string `json:"default_mapped_model,omitempty"`
+	// OpenAI Messages 调度模型配置：按 Claude 系列/精确模型映射到目标 GPT 模型
+	MessagesDispatchModelConfig domain.OpenAIMessagesDispatchModelConfig `json:"messages_dispatch_model_config,omitempty"`
 	// Edges holds the relations/edges for other nodes in the graph.
 	// The values are being populated by the GroupQuery when eager-loading is set.
 	Edges        GroupEdges `json:"edges"`
@@ -182,7 +185,7 @@ func (*Group) scanValues(columns []string) ([]any, error) {
 	values := make([]any, len(columns))
 	for i := range columns {
 		switch columns[i] {
-		case group.FieldModelRouting, group.FieldSupportedModelScopes:
+		case group.FieldModelRouting, group.FieldSupportedModelScopes, group.FieldMessagesDispatchModelConfig:
 			values[i] = new([]byte)
 		case group.FieldIsExclusive, group.FieldClaudeCodeOnly, group.FieldModelRoutingEnabled, group.FieldMcpXMLInject, group.FieldAllowMessagesDispatch, group.FieldRequireOauthOnly, group.FieldRequirePrivacySet:
 			values[i] = new(sql.NullBool)
@@ -403,6 +406,14 @@ func (_m *Group) assignValues(columns []string, values []any) error {
 			} else if value.Valid {
 				_m.DefaultMappedModel = value.String
 			}
+		case group.FieldMessagesDispatchModelConfig:
+			if value, ok := values[i].(*[]byte); !ok {
+				return fmt.Errorf("unexpected type %T for field messages_dispatch_model_config", values[i])
+			} else if value != nil && len(*value) > 0 {
+				if err := json.Unmarshal(*value, &_m.MessagesDispatchModelConfig); err != nil {
+					return fmt.Errorf("unmarshal field messages_dispatch_model_config: %w", err)
+				}
+			}
 		default:
 			_m.selectValues.Set(columns[i], values[i])
 		}
@@ -585,6 +596,9 @@ func (_m *Group) String() string {
 	builder.WriteString(", ")
 	builder.WriteString("default_mapped_model=")
 	builder.WriteString(_m.DefaultMappedModel)
+	builder.WriteString(", ")
+	builder.WriteString("messages_dispatch_model_config=")
+	builder.WriteString(fmt.Sprintf("%v", _m.MessagesDispatchModelConfig))
 	builder.WriteByte(')')
 	return builder.String()
 }

backend/ent/group/group.go

@@ -8,6 +8,7 @@ import (
 	"entgo.io/ent"
 	"entgo.io/ent/dialect/sql"
 	"entgo.io/ent/dialect/sql/sqlgraph"
+	"github.com/Wei-Shaw/sub2api/internal/domain"
 )
 
 const (
@@ -73,6 +74,8 @@ const (
 	FieldRequirePrivacySet = "require_privacy_set"
 	// FieldDefaultMappedModel holds the string denoting the default_mapped_model field in the database.
 	FieldDefaultMappedModel = "default_mapped_model"
+	// FieldMessagesDispatchModelConfig holds the string denoting the messages_dispatch_model_config field in the database.
+	FieldMessagesDispatchModelConfig = "messages_dispatch_model_config"
 	// EdgeAPIKeys holds the string denoting the api_keys edge name in mutations.
 	EdgeAPIKeys = "api_keys"
 	// EdgeRedeemCodes holds the string denoting the redeem_codes edge name in mutations.
@@ -177,6 +180,7 @@ var Columns = []string{
 	FieldRequireOauthOnly,
 	FieldRequirePrivacySet,
 	FieldDefaultMappedModel,
+	FieldMessagesDispatchModelConfig,
 }
 
 var (
@@ -252,6 +256,8 @@ var (
 	DefaultDefaultMappedModel string
 	// DefaultMappedModelValidator is a validator for the "default_mapped_model" field. It is called by the builders before save.
 	DefaultMappedModelValidator func(string) error
+	// DefaultMessagesDispatchModelConfig holds the default value on creation for the "messages_dispatch_model_config" field.
+	DefaultMessagesDispatchModelConfig domain.OpenAIMessagesDispatchModelConfig
 )
 
 // OrderOption defines the ordering options for the Group queries.

backend/ent/group_create.go

@@ -18,6 +18,7 @@ import (
 	"github.com/Wei-Shaw/sub2api/ent/usagelog"
 	"github.com/Wei-Shaw/sub2api/ent/user"
 	"github.com/Wei-Shaw/sub2api/ent/usersubscription"
+	"github.com/Wei-Shaw/sub2api/internal/domain"
 )
 
 // GroupCreate is the builder for creating a Group entity.
@@ -410,6 +411,20 @@ func (_c *GroupCreate) SetNillableDefaultMappedModel(v *string) *GroupCreate {
 	return _c
 }
 
+// SetMessagesDispatchModelConfig sets the "messages_dispatch_model_config" field.
+func (_c *GroupCreate) SetMessagesDispatchModelConfig(v domain.OpenAIMessagesDispatchModelConfig) *GroupCreate {
+	_c.mutation.SetMessagesDispatchModelConfig(v)
+	return _c
+}
+
+// SetNillableMessagesDispatchModelConfig sets the "messages_dispatch_model_config" field if the given value is not nil.
+func (_c *GroupCreate) SetNillableMessagesDispatchModelConfig(v *domain.OpenAIMessagesDispatchModelConfig) *GroupCreate {
+	if v != nil {
+		_c.SetMessagesDispatchModelConfig(*v)
+	}
+	return _c
+}
+
 // AddAPIKeyIDs adds the "api_keys" edge to the APIKey entity by IDs.
 func (_c *GroupCreate) AddAPIKeyIDs(ids ...int64) *GroupCreate {
 	_c.mutation.AddAPIKeyIDs(ids...)
@@ -611,6 +626,10 @@ func (_c *GroupCreate) defaults() error {
 		v := group.DefaultDefaultMappedModel
 		_c.mutation.SetDefaultMappedModel(v)
 	}
+	if _, ok := _c.mutation.MessagesDispatchModelConfig(); !ok {
+		v := group.DefaultMessagesDispatchModelConfig
+		_c.mutation.SetMessagesDispatchModelConfig(v)
+	}
 	return nil
 }
 
@@ -695,6 +714,9 @@ func (_c *GroupCreate) check() error {
 			return &ValidationError{Name: "default_mapped_model", err: fmt.Errorf(`ent: validator failed for field "Group.default_mapped_model": %w`, err)}
 		}
 	}
+	if _, ok := _c.mutation.MessagesDispatchModelConfig(); !ok {
+		return &ValidationError{Name: "messages_dispatch_model_config", err: errors.New(`ent: missing required field "Group.messages_dispatch_model_config"`)}
+	}
 	return nil
 }
 
@@ -838,6 +860,10 @@ func (_c *GroupCreate) createSpec() (*Group, *sqlgraph.CreateSpec) {
 		_spec.SetField(group.FieldDefaultMappedModel, field.TypeString, value)
 		_node.DefaultMappedModel = value
 	}
+	if value, ok := _c.mutation.MessagesDispatchModelConfig(); ok {
+		_spec.SetField(group.FieldMessagesDispatchModelConfig, field.TypeJSON, value)
+		_node.MessagesDispatchModelConfig = value
+	}
 	if nodes := _c.mutation.APIKeysIDs(); len(nodes) > 0 {
 		edge := &sqlgraph.EdgeSpec{
 			Rel:     sqlgraph.O2M,
@@ -1462,6 +1488,18 @@ func (u *GroupUpsert) UpdateDefaultMappedModel() *GroupUpsert {
 	return u
 }
 
+// SetMessagesDispatchModelConfig sets the "messages_dispatch_model_config" field.
+func (u *GroupUpsert) SetMessagesDispatchModelConfig(v domain.OpenAIMessagesDispatchModelConfig) *GroupUpsert {
+	u.Set(group.FieldMessagesDispatchModelConfig, v)
+	return u
+}
+
+// UpdateMessagesDispatchModelConfig sets the "messages_dispatch_model_config" field to the value that was provided on create.
+func (u *GroupUpsert) UpdateMessagesDispatchModelConfig() *GroupUpsert {
+	u.SetExcluded(group.FieldMessagesDispatchModelConfig)
+	return u
+}
+
 // UpdateNewValues updates the mutable fields using the new values that were set on create.
 // Using this option is equivalent to using:
 //
@@ -2053,6 +2091,20 @@ func (u *GroupUpsertOne) UpdateDefaultMappedModel() *GroupUpsertOne {
 	})
 }
 
+// SetMessagesDispatchModelConfig sets the "messages_dispatch_model_config" field.
+func (u *GroupUpsertOne) SetMessagesDispatchModelConfig(v domain.OpenAIMessagesDispatchModelConfig) *GroupUpsertOne {
+	return u.Update(func(s *GroupUpsert) {
+		s.SetMessagesDispatchModelConfig(v)
+	})
+}
+
+// UpdateMessagesDispatchModelConfig sets the "messages_dispatch_model_config" field to the value that was provided on create.
+func (u *GroupUpsertOne) UpdateMessagesDispatchModelConfig() *GroupUpsertOne {
+	return u.Update(func(s *GroupUpsert) {
+		s.UpdateMessagesDispatchModelConfig()
+	})
+}
+
 // Exec executes the query.
 func (u *GroupUpsertOne) Exec(ctx context.Context) error {
 	if len(u.create.conflict) == 0 {
@@ -2810,6 +2862,20 @@ func (u *GroupUpsertBulk) UpdateDefaultMappedModel() *GroupUpsertBulk {
 	})
 }
 
+// SetMessagesDispatchModelConfig sets the "messages_dispatch_model_config" field.
+func (u *GroupUpsertBulk) SetMessagesDispatchModelConfig(v domain.OpenAIMessagesDispatchModelConfig) *GroupUpsertBulk {
+	return u.Update(func(s *GroupUpsert) {
+		s.SetMessagesDispatchModelConfig(v)
+	})
+}
+
+// UpdateMessagesDispatchModelConfig sets the "messages_dispatch_model_config" field to the value that was provided on create.
+func (u *GroupUpsertBulk) UpdateMessagesDispatchModelConfig() *GroupUpsertBulk {
+	return u.Update(func(s *GroupUpsert) {
+		s.UpdateMessagesDispatchModelConfig()
+	})
+}
+
 // Exec executes the query.
 func (u *GroupUpsertBulk) Exec(ctx context.Context) error {
 	if u.create.err != nil {

backend/ent/group_update.go

@@ -20,6 +20,7 @@ import (
 	"github.com/Wei-Shaw/sub2api/ent/usagelog"
 	"github.com/Wei-Shaw/sub2api/ent/user"
 	"github.com/Wei-Shaw/sub2api/ent/usersubscription"
+	"github.com/Wei-Shaw/sub2api/internal/domain"
 )
 
 // GroupUpdate is the builder for updating Group entities.
@@ -552,6 +553,20 @@ func (_u *GroupUpdate) SetNillableDefaultMappedModel(v *string) *GroupUpdate {
 	return _u
 }
 
+// SetMessagesDispatchModelConfig sets the "messages_dispatch_model_config" field.
+func (_u *GroupUpdate) SetMessagesDispatchModelConfig(v domain.OpenAIMessagesDispatchModelConfig) *GroupUpdate {
+	_u.mutation.SetMessagesDispatchModelConfig(v)
+	return _u
+}
+
+// SetNillableMessagesDispatchModelConfig sets the "messages_dispatch_model_config" field if the given value is not nil.
+func (_u *GroupUpdate) SetNillableMessagesDispatchModelConfig(v *domain.OpenAIMessagesDispatchModelConfig) *GroupUpdate {
+	if v != nil {
+		_u.SetMessagesDispatchModelConfig(*v)
+	}
+	return _u
+}
+
 // AddAPIKeyIDs adds the "api_keys" edge to the APIKey entity by IDs.
 func (_u *GroupUpdate) AddAPIKeyIDs(ids ...int64) *GroupUpdate {
 	_u.mutation.AddAPIKeyIDs(ids...)
@@ -1012,6 +1027,9 @@ func (_u *GroupUpdate) sqlSave(ctx context.Context) (_node int, err error) {
 	if value, ok := _u.mutation.DefaultMappedModel(); ok {
 		_spec.SetField(group.FieldDefaultMappedModel, field.TypeString, value)
 	}
+	if value, ok := _u.mutation.MessagesDispatchModelConfig(); ok {
+		_spec.SetField(group.FieldMessagesDispatchModelConfig, field.TypeJSON, value)
+	}
 	if _u.mutation.APIKeysCleared() {
 		edge := &sqlgraph.EdgeSpec{
 			Rel:     sqlgraph.O2M,
@@ -1843,6 +1861,20 @@ func (_u *GroupUpdateOne) SetNillableDefaultMappedModel(v *string) *GroupUpdateO
 	return _u
 }
 
+// SetMessagesDispatchModelConfig sets the "messages_dispatch_model_config" field.
+func (_u *GroupUpdateOne) SetMessagesDispatchModelConfig(v domain.OpenAIMessagesDispatchModelConfig) *GroupUpdateOne {
+	_u.mutation.SetMessagesDispatchModelConfig(v)
+	return _u
+}
+
+// SetNillableMessagesDispatchModelConfig sets the "messages_dispatch_model_config" field if the given value is not nil.
+func (_u *GroupUpdateOne) SetNillableMessagesDispatchModelConfig(v *domain.OpenAIMessagesDispatchModelConfig) *GroupUpdateOne {
+	if v != nil {
+		_u.SetMessagesDispatchModelConfig(*v)
+	}
+	return _u
+}
+
 // AddAPIKeyIDs adds the "api_keys" edge to the APIKey entity by IDs.
 func (_u *GroupUpdateOne) AddAPIKeyIDs(ids ...int64) *GroupUpdateOne {
 	_u.mutation.AddAPIKeyIDs(ids...)
@@ -2333,6 +2365,9 @@ func (_u *GroupUpdateOne) sqlSave(ctx context.Context) (_node *Group, err error)
 	if value, ok := _u.mutation.DefaultMappedModel(); ok {
 		_spec.SetField(group.FieldDefaultMappedModel, field.TypeString, value)
 	}
+	if value, ok := _u.mutation.MessagesDispatchModelConfig(); ok {
+		_spec.SetField(group.FieldMessagesDispatchModelConfig, field.TypeJSON, value)
+	}
 	if _u.mutation.APIKeysCleared() {
 		edge := &sqlgraph.EdgeSpec{
 			Rel:     sqlgraph.O2M,

backend/ent/migrate/schema.go

@@ -407,6 +407,7 @@ var (
 		{Name: "require_oauth_only", Type: field.TypeBool, Default: false},
 		{Name: "require_privacy_set", Type: field.TypeBool, Default: false},
 		{Name: "default_mapped_model", Type: field.TypeString, Size: 100, Default: ""},
+		{Name: "messages_dispatch_model_config", Type: field.TypeJSON, SchemaType: map[string]string{"postgres": "jsonb"}},
 	}
 	// GroupsTable holds the schema information for the "groups" table.
 	GroupsTable = &schema.Table{

backend/ent/mutation.go

@@ -8246,6 +8246,7 @@ type GroupMutation struct {
 	require_oauth_only                      *bool
 	require_privacy_set                     *bool
 	default_mapped_model                    *string
+	messages_dispatch_model_config          *domain.OpenAIMessagesDispatchModelConfig
 	clearedFields                           map[string]struct{}
 	api_keys                                map[int64]struct{}
 	removedapi_keys                         map[int64]struct{}
@@ -9798,6 +9799,42 @@ func (m *GroupMutation) ResetDefaultMappedModel() {
 	m.default_mapped_model = nil
 }
+// SetMessagesDispatchModelConfig sets the "messages_dispatch_model_config" field.
+func (m *GroupMutation) SetMessagesDispatchModelConfig(damdmc domain.OpenAIMessagesDispatchModelConfig) {
+	m.messages_dispatch_model_config = &damdmc
+}
+
+// MessagesDispatchModelConfig returns the value of the "messages_dispatch_model_config" field in the mutation.
+func (m *GroupMutation) MessagesDispatchModelConfig() (r domain.OpenAIMessagesDispatchModelConfig, exists bool) {
+	v := m.messages_dispatch_model_config
+	if v == nil {
+		return
+	}
+	return *v, true
+}
+
+// OldMessagesDispatchModelConfig returns the old "messages_dispatch_model_config" field's value of the Group entity.
+// If the Group object wasn't provided to the builder, the object is fetched from the database.
+// An error is returned if the mutation operation is not UpdateOne, or the database query fails.
+func (m *GroupMutation) OldMessagesDispatchModelConfig(ctx context.Context) (v domain.OpenAIMessagesDispatchModelConfig, err error) {
+	if !m.op.Is(OpUpdateOne) {
+		return v, errors.New("OldMessagesDispatchModelConfig is only allowed on UpdateOne operations")
+	}
+	if m.id == nil || m.oldValue == nil {
+		return v, errors.New("OldMessagesDispatchModelConfig requires an ID field in the mutation")
+	}
+	oldValue, err := m.oldValue(ctx)
+	if err != nil {
+		return v, fmt.Errorf("querying old value for OldMessagesDispatchModelConfig: %w", err)
+	}
+	return oldValue.MessagesDispatchModelConfig, nil
+}
+
+// ResetMessagesDispatchModelConfig resets all changes to the "messages_dispatch_model_config" field.
+func (m *GroupMutation) ResetMessagesDispatchModelConfig() {
+	m.messages_dispatch_model_config = nil
+}
+
 // AddAPIKeyIDs adds the "api_keys" edge to the APIKey entity by ids.
 func (m *GroupMutation) AddAPIKeyIDs(ids ...int64) {
 	if m.api_keys == nil {
@@ -10156,7 +10193,7 @@ func (m *GroupMutation) Type() string {
 // order to get all numeric fields that were incremented/decremented, call
 // AddedFields().
 func (m *GroupMutation) Fields() []string {
-	fields := make([]string, 0, 29)
+	fields := make([]string, 0, 30)
 	if m.created_at != nil {
 		fields = append(fields, group.FieldCreatedAt)
 	}
@@ -10244,6 +10281,9 @@ func (m *GroupMutation) Fields() []string {
 	if m.default_mapped_model != nil {
 		fields = append(fields, group.FieldDefaultMappedModel)
 	}
+	if m.messages_dispatch_model_config != nil {
+		fields = append(fields, group.FieldMessagesDispatchModelConfig)
+	}
 	return fields
 }
@@ -10310,6 +10350,8 @@ func (m *GroupMutation) Field(name string) (ent.Value, bool) {
 		return m.RequirePrivacySet()
 	case group.FieldDefaultMappedModel:
 		return m.DefaultMappedModel()
+	case group.FieldMessagesDispatchModelConfig:
+		return m.MessagesDispatchModelConfig()
 	}
 	return nil, false
 }
@@ -10377,6 +10419,8 @@ func (m *GroupMutation) OldField(ctx context.Context, name string) (ent.Value, e
 		return m.OldRequirePrivacySet(ctx)
 	case group.FieldDefaultMappedModel:
 		return m.OldDefaultMappedModel(ctx)
+	case group.FieldMessagesDispatchModelConfig:
+		return m.OldMessagesDispatchModelConfig(ctx)
 	}
 	return nil, fmt.Errorf("unknown Group field %s", name)
 }
@@ -10589,6 +10633,13 @@ func (m *GroupMutation) SetField(name string, value ent.Value) error {
 		}
 		m.SetDefaultMappedModel(v)
 		return nil
+	case group.FieldMessagesDispatchModelConfig:
+		v, ok := value.(domain.OpenAIMessagesDispatchModelConfig)
+		if !ok {
+			return fmt.Errorf("unexpected type %T for field %s", value, name)
+		}
+		m.SetMessagesDispatchModelConfig(v)
+		return nil
 	}
 	return fmt.Errorf("unknown Group field %s", name)
 }
@@ -10929,6 +10980,9 @@ func (m *GroupMutation) ResetField(name string) error {
 	case group.FieldDefaultMappedModel:
 		m.ResetDefaultMappedModel()
 		return nil
+	case group.FieldMessagesDispatchModelConfig:
+		m.ResetMessagesDispatchModelConfig()
+		return nil
 	}
 	return fmt.Errorf("unknown Group field %s", name)
 }

backend/ent/runtime/runtime.go

@@ -28,6 +28,7 @@ import (
 	"github.com/Wei-Shaw/sub2api/ent/userattributedefinition"
 	"github.com/Wei-Shaw/sub2api/ent/userattributevalue"
 	"github.com/Wei-Shaw/sub2api/ent/usersubscription"
+	"github.com/Wei-Shaw/sub2api/internal/domain"
 )
 
 // The init function reads all schema descriptors with runtime code
@@ -468,6 +469,10 @@ func init() {
 	group.DefaultDefaultMappedModel = groupDescDefaultMappedModel.Default.(string)
 	// group.DefaultMappedModelValidator is a validator for the "default_mapped_model" field. It is called by the builders before save.
 	group.DefaultMappedModelValidator = groupDescDefaultMappedModel.Validators[0].(func(string) error)
+	// groupDescMessagesDispatchModelConfig is the schema descriptor for messages_dispatch_model_config field.
+	groupDescMessagesDispatchModelConfig := groupFields[26].Descriptor()
+	// group.DefaultMessagesDispatchModelConfig holds the default value on creation for the messages_dispatch_model_config field.
+	group.DefaultMessagesDispatchModelConfig = groupDescMessagesDispatchModelConfig.Default.(domain.OpenAIMessagesDispatchModelConfig)
 	idempotencyrecordMixin := schema.IdempotencyRecord{}.Mixin()
 	idempotencyrecordMixinFields0 := idempotencyrecordMixin[0].Fields()
 	_ = idempotencyrecordMixinFields0

backend/ent/schema/group.go

@@ -141,6 +141,10 @@ func (Group) Fields() []ent.Field {
 			MaxLen(100).
 			Default("").
 			Comment("默认映射模型 ID，当账号级映射找不到时使用此值"),
+		field.JSON("messages_dispatch_model_config", domain.OpenAIMessagesDispatchModelConfig{}).
+			Default(domain.OpenAIMessagesDispatchModelConfig{}).
+			SchemaType(map[string]string{dialect.Postgres: "jsonb"}).
+			Comment("OpenAI Messages 调度模型配置：按 Claude 系列/精确模型映射到目标 GPT 模型"),
 	}
 }
 

backend/internal/domain/openai_messages_dispatch.go

+package domain
+
+// OpenAIMessagesDispatchModelConfig controls how Anthropic /v1/messages
+// requests are mapped onto OpenAI/Codex models.
+type OpenAIMessagesDispatchModelConfig struct {
+	OpusMappedModel    string            `json:"opus_mapped_model,omitempty"`
+	SonnetMappedModel  string            `json:"sonnet_mapped_model,omitempty"`
+	HaikuMappedModel   string            `json:"haiku_mapped_model,omitempty"`
+	ExactModelMappings map[string]string `json:"exact_model_mappings,omitempty"`
+}

backend/internal/handler/admin/group_handler.go

@@ -105,10 +105,11 @@ type CreateGroupRequest struct {
 	// 支持的模型系列（仅 antigravity 平台使用）
 	SupportedModelScopes []string `json:"supported_model_scopes"`
 	// OpenAI Messages 调度配置（仅 openai 平台使用）
-	AllowMessagesDispatch bool   `json:"allow_messages_dispatch"`
-	RequireOAuthOnly      bool   `json:"require_oauth_only"`
-	RequirePrivacySet     bool   `json:"require_privacy_set"`
-	DefaultMappedModel    string `json:"default_mapped_model"`
+	AllowMessagesDispatch       bool                                      `json:"allow_messages_dispatch"`
+	RequireOAuthOnly            bool                                      `json:"require_oauth_only"`
+	RequirePrivacySet           bool                                      `json:"require_privacy_set"`
+	DefaultMappedModel          string                                    `json:"default_mapped_model"`
+	MessagesDispatchModelConfig service.OpenAIMessagesDispatchModelConfig `json:"messages_dispatch_model_config"`
 	// 从指定分组复制账号（创建后自动绑定）
 	CopyAccountsFromGroupIDs []int64 `json:"copy_accounts_from_group_ids"`
 }
@@ -139,10 +140,11 @@ type UpdateGroupRequest struct {
 	// 支持的模型系列（仅 antigravity 平台使用）
 	SupportedModelScopes *[]string `json:"supported_model_scopes"`
 	// OpenAI Messages 调度配置（仅 openai 平台使用）
-	AllowMessagesDispatch *bool   `json:"allow_messages_dispatch"`
-	RequireOAuthOnly      *bool   `json:"require_oauth_only"`
-	RequirePrivacySet     *bool   `json:"require_privacy_set"`
-	DefaultMappedModel    *string `json:"default_mapped_model"`
+	AllowMessagesDispatch       *bool                                      `json:"allow_messages_dispatch"`
+	RequireOAuthOnly            *bool                                      `json:"require_oauth_only"`
+	RequirePrivacySet           *bool                                      `json:"require_privacy_set"`
+	DefaultMappedModel          *string                                    `json:"default_mapped_model"`
+	MessagesDispatchModelConfig *service.OpenAIMessagesDispatchModelConfig `json:"messages_dispatch_model_config"`
 	// 从指定分组复制账号（同步操作：先清空当前分组的账号绑定，再绑定源分组的账号）
 	CopyAccountsFromGroupIDs []int64 `json:"copy_accounts_from_group_ids"`
 }
@@ -257,6 +259,7 @@ func (h *GroupHandler) Create(c *gin.Context) {
 		RequireOAuthOnly:                req.RequireOAuthOnly,
 		RequirePrivacySet:               req.RequirePrivacySet,
 		DefaultMappedModel:              req.DefaultMappedModel,
+		MessagesDispatchModelConfig:     req.MessagesDispatchModelConfig,
 		CopyAccountsFromGroupIDs:        req.CopyAccountsFromGroupIDs,
 	})
 	if err != nil {
@@ -307,6 +310,7 @@ func (h *GroupHandler) Update(c *gin.Context) {
 		RequireOAuthOnly:                req.RequireOAuthOnly,
 		RequirePrivacySet:               req.RequirePrivacySet,
 		DefaultMappedModel:              req.DefaultMappedModel,
+		MessagesDispatchModelConfig:     req.MessagesDispatchModelConfig,
 		CopyAccountsFromGroupIDs:        req.CopyAccountsFromGroupIDs,
 	})
 	if err != nil {

backend/internal/handler/dto/mappers.go

@@ -133,16 +133,17 @@ func GroupFromServiceAdmin(g *service.Group) *AdminGroup {
 		return nil
 	}
 	out := &AdminGroup{
-		Group:                   groupFromServiceBase(g),
-		ModelRouting:            g.ModelRouting,
-		ModelRoutingEnabled:     g.ModelRoutingEnabled,
-		MCPXMLInject:            g.MCPXMLInject,
-		DefaultMappedModel:      g.DefaultMappedModel,
-		SupportedModelScopes:    g.SupportedModelScopes,
-		AccountCount:            g.AccountCount,
-		ActiveAccountCount:      g.ActiveAccountCount,
-		RateLimitedAccountCount: g.RateLimitedAccountCount,
-		SortOrder:               g.SortOrder,
+		Group:                       groupFromServiceBase(g),
+		ModelRouting:                g.ModelRouting,
+		ModelRoutingEnabled:         g.ModelRoutingEnabled,
+		MCPXMLInject:                g.MCPXMLInject,
+		DefaultMappedModel:          g.DefaultMappedModel,
+		MessagesDispatchModelConfig: g.MessagesDispatchModelConfig,
+		SupportedModelScopes:        g.SupportedModelScopes,
+		AccountCount:                g.AccountCount,
+		ActiveAccountCount:          g.ActiveAccountCount,
+		RateLimitedAccountCount:     g.RateLimitedAccountCount,
+		SortOrder:                   g.SortOrder,
 	}
 	if len(g.AccountGroups) > 0 {
 		out.AccountGroups = make([]AccountGroup, 0, len(g.AccountGroups))

backend/internal/handler/dto/types.go

 package dto
 
-import "time"
+import (
+	"time"
+
+	"github.com/Wei-Shaw/sub2api/internal/domain"
+)
 
 type User struct {
 	ID            int64     `json:"id"`
@@ -112,7 +116,8 @@ type AdminGroup struct {
 	MCPXMLInject bool `json:"mcp_xml_inject"`
 
 	// OpenAI Messages 调度配置（仅 openai 平台使用）
-	DefaultMappedModel string `json:"default_mapped_model"`
+	DefaultMappedModel          string                                   `json:"default_mapped_model"`
+	MessagesDispatchModelConfig domain.OpenAIMessagesDispatchModelConfig `json:"messages_dispatch_model_config"`
 
 	// 支持的模型系列（仅 antigravity 平台使用）
 	SupportedModelScopes    []string       `json:"supported_model_scopes"`

backend/internal/repository/group_repo.go

@@ -58,7 +58,8 @@ func (r *groupRepository) Create(ctx context.Context, groupIn *service.Group) er
 		SetAllowMessagesDispatch(groupIn.AllowMessagesDispatch).
 		SetRequireOauthOnly(groupIn.RequireOAuthOnly).
 		SetRequirePrivacySet(groupIn.RequirePrivacySet).
-		SetDefaultMappedModel(groupIn.DefaultMappedModel)
+		SetDefaultMappedModel(groupIn.DefaultMappedModel).
+		SetMessagesDispatchModelConfig(groupIn.MessagesDispatchModelConfig)
 
 	// 设置模型路由配置
 	if groupIn.ModelRouting != nil {
@@ -124,7 +125,8 @@ func (r *groupRepository) Update(ctx context.Context, groupIn *service.Group) er
 		SetAllowMessagesDispatch(groupIn.AllowMessagesDispatch).
 		SetRequireOauthOnly(groupIn.RequireOAuthOnly).
 		SetRequirePrivacySet(groupIn.RequirePrivacySet).
-		SetDefaultMappedModel(groupIn.DefaultMappedModel)
+		SetDefaultMappedModel(groupIn.DefaultMappedModel).
+		SetMessagesDispatchModelConfig(groupIn.MessagesDispatchModelConfig)
 
 	// 显式处理可空字段：nil 需要 clear，非 nil 需要 set。
 	if groupIn.DailyLimitUSD != nil {

backend/internal/service/admin_service.go

@@ -152,10 +152,11 @@ type CreateGroupInput struct {
 	// 支持的模型系列（仅 antigravity 平台使用）
 	SupportedModelScopes []string
 	// OpenAI Messages 调度配置（仅 openai 平台使用）
-	AllowMessagesDispatch bool
-	DefaultMappedModel    string
-	RequireOAuthOnly      bool
-	RequirePrivacySet     bool
+	AllowMessagesDispatch       bool
+	DefaultMappedModel          string
+	RequireOAuthOnly            bool
+	RequirePrivacySet           bool
+	MessagesDispatchModelConfig OpenAIMessagesDispatchModelConfig
 	// 从指定分组复制账号（创建分组后在同一事务内绑定）
 	CopyAccountsFromGroupIDs []int64
 }
@@ -186,10 +187,11 @@ type UpdateGroupInput struct {
 	// 支持的模型系列（仅 antigravity 平台使用）
 	SupportedModelScopes *[]string
 	// OpenAI Messages 调度配置（仅 openai 平台使用）
-	AllowMessagesDispatch *bool
-	DefaultMappedModel    *string
-	RequireOAuthOnly      *bool
-	RequirePrivacySet     *bool
+	AllowMessagesDispatch       *bool
+	DefaultMappedModel          *string
+	RequireOAuthOnly            *bool
+	RequirePrivacySet           *bool
+	MessagesDispatchModelConfig *OpenAIMessagesDispatchModelConfig
 	// 从指定分组复制账号（同步操作：先清空当前分组的账号绑定，再绑定源分组的账号）
 	CopyAccountsFromGroupIDs []int64
 }
@@ -908,7 +910,9 @@ func (s *adminServiceImpl) CreateGroup(ctx context.Context, input *CreateGroupIn
 		RequireOAuthOnly:                input.RequireOAuthOnly,
 		RequirePrivacySet:               input.RequirePrivacySet,
 		DefaultMappedModel:              input.DefaultMappedModel,
+		MessagesDispatchModelConfig:     normalizeOpenAIMessagesDispatchModelConfig(input.MessagesDispatchModelConfig),
 	}
+	sanitizeGroupMessagesDispatchFields(group)
 	if err := s.groupRepo.Create(ctx, group); err != nil {
 		return nil, err
 	}
@@ -1135,6 +1139,10 @@ func (s *adminServiceImpl) UpdateGroup(ctx context.Context, id int64, input *Upd
 	if input.DefaultMappedModel != nil {
 		group.DefaultMappedModel = *input.DefaultMappedModel
 	}
+	if input.MessagesDispatchModelConfig != nil {
+		group.MessagesDispatchModelConfig = normalizeOpenAIMessagesDispatchModelConfig(*input.MessagesDispatchModelConfig)
+	}
+	sanitizeGroupMessagesDispatchFields(group)
 
 	if err := s.groupRepo.Update(ctx, group); err != nil {
 		return nil, err

backend/internal/service/admin_service_group_test.go

@@ -245,6 +245,116 @@ func TestAdminService_UpdateGroup_PartialImagePricing(t *testing.T) {
 	require.Nil(t, repo.updated.ImagePrice4K)
 }
 
+func TestAdminService_CreateGroup_NormalizesMessagesDispatchModelConfig(t *testing.T) {
+	repo := &groupRepoStubForAdmin{}
+	svc := &adminServiceImpl{groupRepo: repo}
+
+	group, err := svc.CreateGroup(context.Background(), &CreateGroupInput{
+		Name:           "dispatch-group",
+		Description:    "dispatch config",
+		Platform:       PlatformOpenAI,
+		RateMultiplier: 1.0,
+		MessagesDispatchModelConfig: OpenAIMessagesDispatchModelConfig{
+			OpusMappedModel:   " gpt-5.4-high ",
+			SonnetMappedModel: " gpt-5.3-codex ",
+			HaikuMappedModel:  " gpt-5.4-mini-medium ",
+			ExactModelMappings: map[string]string{
+				" claude-sonnet-4-5-20250929 ": " gpt-5.2-high ",
+			},
+		},
+	})
+	require.NoError(t, err)
+	require.NotNil(t, group)
+	require.NotNil(t, repo.created)
+	require.Equal(t, OpenAIMessagesDispatchModelConfig{
+		OpusMappedModel:   "gpt-5.4",
+		SonnetMappedModel: "gpt-5.3-codex",
+		HaikuMappedModel:  "gpt-5.4-mini",
+		ExactModelMappings: map[string]string{
+			"claude-sonnet-4-5-20250929": "gpt-5.2",
+		},
+	}, repo.created.MessagesDispatchModelConfig)
+}
+
+func TestAdminService_UpdateGroup_NormalizesMessagesDispatchModelConfig(t *testing.T) {
+	existingGroup := &Group{
+		ID:       1,
+		Name:     "existing-group",
+		Platform: PlatformOpenAI,
+		Status:   StatusActive,
+	}
+	repo := &groupRepoStubForAdmin{getByID: existingGroup}
+	svc := &adminServiceImpl{groupRepo: repo}
+
+	group, err := svc.UpdateGroup(context.Background(), 1, &UpdateGroupInput{
+		MessagesDispatchModelConfig: &OpenAIMessagesDispatchModelConfig{
+			SonnetMappedModel: " gpt-5.4-medium ",
+			ExactModelMappings: map[string]string{
+				" claude-haiku-4-5-20251001 ": " gpt-5.4-mini-high ",
+			},
+		},
+	})
+	require.NoError(t, err)
+	require.NotNil(t, group)
+	require.NotNil(t, repo.updated)
+	require.Equal(t, OpenAIMessagesDispatchModelConfig{
+		SonnetMappedModel: "gpt-5.4",
+		ExactModelMappings: map[string]string{
+			"claude-haiku-4-5-20251001": "gpt-5.4-mini",
+		},
+	}, repo.updated.MessagesDispatchModelConfig)
+}
+
+func TestAdminService_CreateGroup_ClearsMessagesDispatchFieldsForNonOpenAIPlatform(t *testing.T) {
+	repo := &groupRepoStubForAdmin{}
+	svc := &adminServiceImpl{groupRepo: repo}
+
+	group, err := svc.CreateGroup(context.Background(), &CreateGroupInput{
+		Name:                  "anthropic-group",
+		Description:           "non-openai",
+		Platform:              PlatformAnthropic,
+		RateMultiplier:        1.0,
+		AllowMessagesDispatch: true,
+		DefaultMappedModel:    "gpt-5.4",
+		MessagesDispatchModelConfig: OpenAIMessagesDispatchModelConfig{
+			OpusMappedModel: "gpt-5.4",
+		},
+	})
+	require.NoError(t, err)
+	require.NotNil(t, group)
+	require.NotNil(t, repo.created)
+	require.False(t, repo.created.AllowMessagesDispatch)
+	require.Empty(t, repo.created.DefaultMappedModel)
+	require.Equal(t, OpenAIMessagesDispatchModelConfig{}, repo.created.MessagesDispatchModelConfig)
+}
+
+func TestAdminService_UpdateGroup_ClearsMessagesDispatchFieldsWhenPlatformChangesAwayFromOpenAI(t *testing.T) {
+	existingGroup := &Group{
+		ID:                    1,
+		Name:                  "existing-openai-group",
+		Platform:              PlatformOpenAI,
+		Status:                StatusActive,
+		AllowMessagesDispatch: true,
+		DefaultMappedModel:    "gpt-5.4",
+		MessagesDispatchModelConfig: OpenAIMessagesDispatchModelConfig{
+			SonnetMappedModel: "gpt-5.3-codex",
+		},
+	}
+	repo := &groupRepoStubForAdmin{getByID: existingGroup}
+	svc := &adminServiceImpl{groupRepo: repo}
+
+	group, err := svc.UpdateGroup(context.Background(), 1, &UpdateGroupInput{
+		Platform: ptrString(PlatformAnthropic),
+	})
+	require.NoError(t, err)
+	require.NotNil(t, group)
+	require.NotNil(t, repo.updated)
+	require.Equal(t, PlatformAnthropic, repo.updated.Platform)
+	require.False(t, repo.updated.AllowMessagesDispatch)
+	require.Empty(t, repo.updated.DefaultMappedModel)
+	require.Equal(t, OpenAIMessagesDispatchModelConfig{}, repo.updated.MessagesDispatchModelConfig)
+}
+
 func TestAdminService_ListGroups_WithSearch(t *testing.T) {
 	// 测试：
 	// 1. search 参数正常传递到 repository 层

backend/internal/service/group.go

@@ -3,8 +3,12 @@ package service
 import (
 	"strings"
 	"time"
+
+	"github.com/Wei-Shaw/sub2api/internal/domain"
 )
 
+type OpenAIMessagesDispatchModelConfig = domain.OpenAIMessagesDispatchModelConfig
+
 type Group struct {
 	ID             int64
 	Name           string
@@ -49,10 +53,11 @@ type Group struct {
 	SortOrder int
 
 	// OpenAI Messages 调度配置（仅 openai 平台使用）
-	AllowMessagesDispatch bool
-	RequireOAuthOnly      bool // 仅允许非 apikey 类型账号关联（OpenAI/Antigravity/Anthropic/Gemini）
-	RequirePrivacySet     bool // 调度时仅允许 privacy 已成功设置的账号（OpenAI/Antigravity/Anthropic/Gemini）
-	DefaultMappedModel    string
+	AllowMessagesDispatch       bool
+	RequireOAuthOnly            bool // 仅允许非 apikey 类型账号关联（OpenAI/Antigravity/Anthropic/Gemini）
+	RequirePrivacySet           bool // 调度时仅允许 privacy 已成功设置的账号（OpenAI/Antigravity/Anthropic/Gemini）
+	DefaultMappedModel          string
+	MessagesDispatchModelConfig OpenAIMessagesDispatchModelConfig
 
 	CreatedAt time.Time
 	UpdatedAt time.Time

backend/internal/service/openai_messages_dispatch.go

+package service
+
+import "strings"
+
+const (
+	defaultOpenAIMessagesDispatchOpusMappedModel   = "gpt-5.4"
+	defaultOpenAIMessagesDispatchSonnetMappedModel = "gpt-5.3-codex"
+	defaultOpenAIMessagesDispatchHaikuMappedModel  = "gpt-5.4-mini"
+)
+
+func normalizeOpenAIMessagesDispatchMappedModel(model string) string {
+	model = NormalizeOpenAICompatRequestedModel(strings.TrimSpace(model))
+	return strings.TrimSpace(model)
+}
+
+func normalizeOpenAIMessagesDispatchModelConfig(cfg OpenAIMessagesDispatchModelConfig) OpenAIMessagesDispatchModelConfig {
+	out := OpenAIMessagesDispatchModelConfig{
+		OpusMappedModel:   normalizeOpenAIMessagesDispatchMappedModel(cfg.OpusMappedModel),
+		SonnetMappedModel: normalizeOpenAIMessagesDispatchMappedModel(cfg.SonnetMappedModel),
+		HaikuMappedModel:  normalizeOpenAIMessagesDispatchMappedModel(cfg.HaikuMappedModel),
+	}
+
+	if len(cfg.ExactModelMappings) > 0 {
+		out.ExactModelMappings = make(map[string]string, len(cfg.ExactModelMappings))
+		for requestedModel, mappedModel := range cfg.ExactModelMappings {
+			requestedModel = strings.TrimSpace(requestedModel)
+			mappedModel = normalizeOpenAIMessagesDispatchMappedModel(mappedModel)
+			if requestedModel == "" || mappedModel == "" {
+				continue
+			}
+			out.ExactModelMappings[requestedModel] = mappedModel
+		}
+		if len(out.ExactModelMappings) == 0 {
+			out.ExactModelMappings = nil
+		}
+	}
+
+	return out
+}
+
+func claudeMessagesDispatchFamily(model string) string {
+	normalized := strings.ToLower(strings.TrimSpace(model))
+	if !strings.HasPrefix(normalized, "claude") {
+		return ""
+	}
+	switch {
+	case strings.Contains(normalized, "opus"):
+		return "opus"
+	case strings.Contains(normalized, "sonnet"):
+		return "sonnet"
+	case strings.Contains(normalized, "haiku"):
+		return "haiku"
+	default:
+		return ""
+	}
+}
+
+func (g *Group) ResolveMessagesDispatchModel(requestedModel string) string {
+	if g == nil {
+		return ""
+	}
+	requestedModel = strings.TrimSpace(requestedModel)
+	if requestedModel == "" {
+		return ""
+	}
+
+	cfg := normalizeOpenAIMessagesDispatchModelConfig(g.MessagesDispatchModelConfig)
+	if mappedModel := strings.TrimSpace(cfg.ExactModelMappings[requestedModel]); mappedModel != "" {
+		return mappedModel
+	}
+
+	switch claudeMessagesDispatchFamily(requestedModel) {
+	case "opus":
+		if mappedModel := strings.TrimSpace(cfg.OpusMappedModel); mappedModel != "" {
+			return mappedModel
+		}
+		return defaultOpenAIMessagesDispatchOpusMappedModel
+	case "sonnet":
+		if mappedModel := strings.TrimSpace(cfg.SonnetMappedModel); mappedModel != "" {
+			return mappedModel
+		}
+		return defaultOpenAIMessagesDispatchSonnetMappedModel
+	case "haiku":
+		if mappedModel := strings.TrimSpace(cfg.HaikuMappedModel); mappedModel != "" {
+			return mappedModel
+		}
+		return defaultOpenAIMessagesDispatchHaikuMappedModel
+	default:
+		return ""
+	}
+}
+
+func sanitizeGroupMessagesDispatchFields(g *Group) {
+	if g == nil || g.Platform == PlatformOpenAI {
+		return
+	}
+	g.AllowMessagesDispatch = false
+	g.DefaultMappedModel = ""
+	g.MessagesDispatchModelConfig = OpenAIMessagesDispatchModelConfig{}
+}

backend/internal/service/openai_messages_dispatch_test.go

+package service
+
+import "testing"
+
+import "github.com/stretchr/testify/require"
+
+func TestNormalizeOpenAIMessagesDispatchModelConfig(t *testing.T) {
+	t.Parallel()
+
+	cfg := normalizeOpenAIMessagesDispatchModelConfig(OpenAIMessagesDispatchModelConfig{
+		OpusMappedModel:   " gpt-5.4-high ",
+		SonnetMappedModel: "gpt-5.3-codex",
+		HaikuMappedModel:  " gpt-5.4-mini-medium ",
+		ExactModelMappings: map[string]string{
+			" claude-sonnet-4-5-20250929 ": " gpt-5.2-high ",
+			"":                             "gpt-5.4",
+			"claude-opus-4-6":              " ",
+		},
+	})
+
+	require.Equal(t, "gpt-5.4", cfg.OpusMappedModel)
+	require.Equal(t, "gpt-5.3-codex", cfg.SonnetMappedModel)
+	require.Equal(t, "gpt-5.4-mini", cfg.HaikuMappedModel)
+	require.Equal(t, map[string]string{
+		"claude-sonnet-4-5-20250929": "gpt-5.2",
+	}, cfg.ExactModelMappings)
+}

backend/migrations/091_add_group_messages_dispatch_model_config.sql

+ALTER TABLE groups
+ADD COLUMN IF NOT EXISTS messages_dispatch_model_config JSONB NOT NULL DEFAULT '{}'::jsonb;