diff --git a/backend/internal/handler/admin/group_handler.go b/backend/internal/handler/admin/group_handler.go
index 2fcd69a9b2..13f7d2fd8c 100644
--- a/backend/internal/handler/admin/group_handler.go
+++ b/backend/internal/handler/admin/group_handler.go
@@ -147,6 +147,7 @@ type CreateGroupRequest struct {
 	// OpenAI Messages 调度配置（仅 openai 平台使用）
 	AllowMessagesDispatch       bool                                      `json:"allow_messages_dispatch"`
 	AllowLive                   bool                                      `json:"allow_live"`
+	ForceOpenAIFast             bool                                      `json:"force_openai_fast"`
 	RequireOAuthOnly            bool                                      `json:"require_oauth_only"`
 	RequirePrivacySet           bool                                      `json:"require_privacy_set"`
 	DefaultMappedModel          string                                    `json:"default_mapped_model"`
@@ -216,6 +217,7 @@ type UpdateGroupRequest struct {
 	// OpenAI Messages 调度配置（仅 openai 平台使用）
 	AllowMessagesDispatch       *bool                                      `json:"allow_messages_dispatch"`
 	AllowLive                   *bool                                      `json:"allow_live"`
+	ForceOpenAIFast             *bool                                      `json:"force_openai_fast"`
 	RequireOAuthOnly            *bool                                      `json:"require_oauth_only"`
 	RequirePrivacySet           *bool                                      `json:"require_privacy_set"`
 	DefaultMappedModel          *string                                    `json:"default_mapped_model"`
@@ -550,6 +552,7 @@ func (h *GroupHandler) Create(c *gin.Context) {
 		SupportedModelScopes:            req.SupportedModelScopes,
 		AllowMessagesDispatch:           req.AllowMessagesDispatch,
 		AllowLive:                       req.AllowLive,
+		ForceOpenAIFast:                 req.ForceOpenAIFast,
 		RequireOAuthOnly:                req.RequireOAuthOnly,
 		RequirePrivacySet:               req.RequirePrivacySet,
 		DefaultMappedModel:              req.DefaultMappedModel,
@@ -679,6 +682,7 @@ func (h *GroupHandler) Update(c *gin.Context) {
 		SupportedModelScopes:            req.SupportedModelScopes,
 		AllowMessagesDispatch:           req.AllowMessagesDispatch,
 		AllowLive:                       req.AllowLive,
+		ForceOpenAIFast:                 req.ForceOpenAIFast,
 		RequireOAuthOnly:                req.RequireOAuthOnly,
 		RequirePrivacySet:               req.RequirePrivacySet,
 		DefaultMappedModel:              req.DefaultMappedModel,
diff --git a/backend/internal/handler/admin/group_handler_openai_fast_test.go b/backend/internal/handler/admin/group_handler_openai_fast_test.go
new file mode 100644
index 0000000000..22a9a53500
--- /dev/null
+++ b/backend/internal/handler/admin/group_handler_openai_fast_test.go
@@ -0,0 +1,23 @@
+package admin
+
+import (
+	"encoding/json"
+	"testing"
+
+	"github.com/stretchr/testify/require"
+)
+
+func TestGroupRequestsDecodeForceOpenAIFast(t *testing.T) {
+	var createReq CreateGroupRequest
+	require.NoError(t, json.Unmarshal([]byte(`{"name":"fast","force_openai_fast":true}`), &createReq))
+	require.True(t, createReq.ForceOpenAIFast)
+
+	var updateReq UpdateGroupRequest
+	require.NoError(t, json.Unmarshal([]byte(`{"force_openai_fast":false}`), &updateReq))
+	require.NotNil(t, updateReq.ForceOpenAIFast)
+	require.False(t, *updateReq.ForceOpenAIFast)
+
+	var omitted UpdateGroupRequest
+	require.NoError(t, json.Unmarshal([]byte(`{}`), &omitted))
+	require.Nil(t, omitted.ForceOpenAIFast)
+}