diff --git a/apps/api/internal/clients/universal.go b/apps/api/internal/clients/universal.go
index 976a20e..4d1b4da 100644
--- a/apps/api/internal/clients/universal.go
+++ b/apps/api/internal/clients/universal.go
@@ -242,9 +242,13 @@ func universalScriptContext(request Request, modelType string, payload map[strin
 		return selectedBase + "/" + strings.TrimLeft(path, "/")
 	}
 	context["creatRequestURL"] = context["createRequestURL"]
-	context["processedParams"] = cloneBody(request.Body)
+	processedParams := cloneBody(request.Body)
+	processedParams["model"] = upstreamModelName(request.Candidate)
+	context["processedParams"] = processedParams
 	context["preProcessParams"] = func(params map[string]any, _ ...string) map[string]any {
-		return cloneMapAny(params)
+		processed := cloneMapAny(params)
+		processed["model"] = upstreamModelName(request.Candidate)
+		return processed
 	}
 	context["resolveGetTaskURL"] = func(taskID string) string {
 		return resolveUniversalTaskURL(request.Candidate.PlatformConfig, taskID)
diff --git a/apps/api/internal/clients/universal_test.go b/apps/api/internal/clients/universal_test.go
index f08d084..42579cf 100644
--- a/apps/api/internal/clients/universal_test.go
+++ b/apps/api/internal/clients/universal_test.go
@@ -102,7 +102,7 @@ func TestUniversalClientSupportsServerMainScriptContextAndNestedResult(t *testin
 			"customGetParamsScript": map[string]any{
 				"image_generate": `async function getParams(params, context) {
 					const processed = await context.preProcessParams(params, context.type);
-					return { prompt: processed.prompt + "-" + context.processedParams.prompt };
+					return { prompt: processed.prompt + "-" + processed.model + "-" + context.processedParams.model };
 				}`,
 			},
 			"customSubmitScript": map[string]any{
@@ -128,7 +128,7 @@ func TestUniversalClientSupportsServerMainScriptContextAndNestedResult(t *testin
 		t.Fatalf("unexpected nested result: %#v", response.Result)
 	}
 	image, ok := data[0].(map[string]any)
-	if !ok || image["url"] != "https://cdn.example/hello-hello.png" {
+	if !ok || image["url"] != "https://cdn.example/hello-provider-model-provider-model.png" {
 		t.Fatalf("unexpected image result: %#v", response.Result)
 	}
 }