diff --git a/pkg/bridge/ai/api_server.go b/pkg/bridge/ai/api_server.go
index db110f0a6..52dc3656e 100644
--- a/pkg/bridge/ai/api_server.go
+++ b/pkg/bridge/ai/api_server.go
@@ -111,7 +111,7 @@ func decorateReqContext(service *Service, logger *slog.Logger) func(handler http
 
 			caller, err := service.LoadOrCreateCaller(r)
 			if err != nil {
-				RespondWithError(w, http.StatusBadRequest, err)
+				RespondWithError(w, http.StatusBadRequest, err, logger)
 				return
 			}
 			ctx = WithCallerContext(ctx, caller)
@@ -146,7 +146,7 @@ func (h *Handler) HandleOverview(w http.ResponseWriter, r *http.Request) {
 
 	tcs, err := register.ListToolCalls(FromCallerContext(r.Context()).Metadata())
 	if err != nil {
-		RespondWithError(w, http.StatusInternalServerError, err)
+		RespondWithError(w, http.StatusInternalServerError, err, h.service.logger)
 		return
 	}
 
@@ -169,7 +169,7 @@ func (h *Handler) HandleInvoke(w http.ResponseWriter, r *http.Request) {
 	)
 	defer r.Body.Close()
 
-	req, err := DecodeRequest[ai.InvokeRequest](r, w)
+	req, err := DecodeRequest[ai.InvokeRequest](r, w, h.service.logger)
 	if err != nil {
 		return
 	}
@@ -181,7 +181,7 @@ func (h *Handler) HandleInvoke(w http.ResponseWriter, r *http.Request) {
 
 	res, err := h.service.GetInvoke(ctx, req.Prompt, baseSystemMessage, transID, FromCallerContext(ctx), req.IncludeCallStack)
 	if err != nil {
-		RespondWithError(w, http.StatusInternalServerError, err)
+		RespondWithError(w, http.StatusInternalServerError, err, h.service.logger)
 		return
 	}
 
@@ -197,7 +197,7 @@ func (h *Handler) HandleChatCompletions(w http.ResponseWriter, r *http.Request)
 	)
 	defer r.Body.Close()
 
-	req, err := DecodeRequest[openai.ChatCompletionRequest](r, w)
+	req, err := DecodeRequest[openai.ChatCompletionRequest](r, w, h.service.logger)
 	if err != nil {
 		return
 	}
@@ -206,18 +206,18 @@ func (h *Handler) HandleChatCompletions(w http.ResponseWriter, r *http.Request)
 	defer cancel()
 
 	if err := h.service.GetChatCompletions(ctx, req, transID, FromCallerContext(ctx), w); err != nil {
-		RespondWithError(w, http.StatusBadRequest, err)
+		RespondWithError(w, http.StatusBadRequest, err, h.service.logger)
 		return
 	}
 }
 
 // DecodeRequest decodes the request body into given type.
-func DecodeRequest[T any](r *http.Request, w http.ResponseWriter) (T, error) {
+func DecodeRequest[T any](r *http.Request, w http.ResponseWriter, logger *slog.Logger) (T, error) {
 	var req T
 	err := json.NewDecoder(r.Body).Decode(&req)
 	if err != nil {
 		w.Header().Set("Content-Type", "application/json")
-		RespondWithError(w, http.StatusBadRequest, err)
+		RespondWithError(w, http.StatusBadRequest, err, logger)
 		return req, err
 	}
 
@@ -225,9 +225,20 @@ func DecodeRequest[T any](r *http.Request, w http.ResponseWriter) (T, error) {
 }
 
 // RespondWithError writes an error to response according to the OpenAI API spec.
-func RespondWithError(w http.ResponseWriter, code int, err error) {
+func RespondWithError(w http.ResponseWriter, code int, err error, logger *slog.Logger) {
+	logger.Error("bridge server error", "error", err)
+
+	errString := err.Error()
+	oerr, ok := err.(*openai.APIError)
+	if ok {
+		if oerr.HTTPStatusCode >= 400 {
+			code = http.StatusInternalServerError
+			errString = "Internal Server Error, Please Try Again Later."
+		}
+	}
+
 	w.WriteHeader(code)
-	w.Write([]byte(fmt.Sprintf(`{"error":{"code":"%d","message":"%s"}}`, code, err.Error())))
+	w.Write([]byte(fmt.Sprintf(`{"error":{"code":"%d","message":"%s"}}`, code, errString)))
 }
 
 func getLocalIP() (string, error) {
diff --git a/pkg/bridge/ai/service.go b/pkg/bridge/ai/service.go
index fd970465e..d5ea787aa 100644
--- a/pkg/bridge/ai/service.go
+++ b/pkg/bridge/ai/service.go
@@ -255,15 +255,15 @@ func (srv *Service) GetChatCompletions(ctx context.Context, req openai.ChatCompl
 	// 4. request first chat for getting tools
 	if req.Stream {
 		_, firstCallSpan := srv.option.Tracer.Start(reqCtx, "first_call_request")
-		var (
-			flusher        = eventFlusher(w)
-			isFunctionCall = false
-		)
+
 		resStream, err := srv.provider.GetChatCompletionsStream(reqCtx, req, md)
 		if err != nil {
 			return err
 		}
-
+		var (
+			flusher        = eventFlusher(w)
+			isFunctionCall = false
+		)
 		var (
 			i             int // number of chunks
 			j             int // number of tool call chunks