From 6a61b2dacae6a5e934523129ab4b0730dfd16232 Mon Sep 17 00:00:00 2001
From: li <fengshao1227@gmail.com>
Date: Wed, 15 Jul 2026 10:48:30 +0800
Subject: [PATCH] =?UTF-8?q?fix(grok):=20=E6=8B=A6=E6=88=AA=E5=9B=BE?=
 =?UTF-8?q?=E7=89=87=E6=A8=A1=E5=9E=8B=E5=8F=91=E5=BE=80=20Responses=20?=
 =?UTF-8?q?=E7=AB=AF=E7=82=B9=EF=BC=8C=E8=BF=94=E5=9B=9E=E6=98=8E=E7=A1=AE?=
 =?UTF-8?q?=E9=94=99=E8=AF=AF?=
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Fixes #4301
---
 .../internal/service/openai_gateway_grok.go   |  3 +++
 .../service/openai_gateway_grok_test.go       | 22 +++++++++++++++++++
 2 files changed, 25 insertions(+)

diff --git a/backend/internal/service/openai_gateway_grok.go b/backend/internal/service/openai_gateway_grok.go
index 92cf2910c6..93c0f8cb0f 100644
--- a/backend/internal/service/openai_gateway_grok.go
+++ b/backend/internal/service/openai_gateway_grok.go
@@ -49,6 +49,9 @@ func (s *OpenAIGatewayService) forwardGrokResponses(
 	if strings.TrimSpace(upstreamModel) == "" {
 		upstreamModel = grokDefaultResponsesModel
 	}
+	if isGrokImageGenerationModel(upstreamModel) {
+		return nil, fmt.Errorf("model %s is an image model and is not available on the Responses endpoint; use /v1/images/generations instead", upstreamModel)
+	}
 	cacheIdentity := resolveGrokCacheIdentity(c, body, "", upstreamModel)
 	patchedBody, err := patchGrokResponsesBody(body, upstreamModel)
 	if err != nil {
diff --git a/backend/internal/service/openai_gateway_grok_test.go b/backend/internal/service/openai_gateway_grok_test.go
index d93415b2e0..882adc56ed 100644
--- a/backend/internal/service/openai_gateway_grok_test.go
+++ b/backend/internal/service/openai_gateway_grok_test.go
@@ -2037,3 +2037,25 @@ func TestPatchGrokResponsesBody_MultipleReasoningContentNull(t *testing.T) {
 	require.False(t, items[0].Get("content").Exists())
 	require.False(t, items[2].Get("content").Exists())
 }
+
+func TestIsGrokImageGenerationModel(t *testing.T) {
+	t.Parallel()
+
+	tests := []struct {
+		model string
+		want  bool
+	}{
+		{"grok-imagine", true},
+		{"grok-imagine-image-quality", true},
+		{"grok-imagine-edit", true},
+		{"grok-imagine-image-hd", true},
+		{"grok-4.5", false},
+		{"grok-composer", false},
+	}
+	for _, tt := range tests {
+		t.Run(tt.model, func(t *testing.T) {
+			require.Equal(t, tt.want, isGrokImageGenerationModel(tt.model))
+		})
+	}
+}
+