Use routable Doubao LLM model ids

The LLM selector exposed display-style Doubao model names that the NewApiWG test gateway cannot route. The UI now stores the gateway model ids returned by /models, while the API route maps legacy saved selector values to those ids so existing workflows do not keep failing.

Constraint: Preserve GPT-4.1 Mini as the NewApiWG default and keep old workflow JSON compatible.

Rejected: Remove Doubao from the LLM selector | the gateway exposes working Doubao chat model ids, so the issue is stale ids rather than product support.

Confidence: high

Scope-risk: narrow

Directive: LLM selector values must be callable provider ids; use labels only for display text.

Tested: Live NewApiWG chat completion with doubao-seed-2-0-lite-260428 and doubao-seed-2-0-pro-260215.

Tested: npm run test:run -- src/lib/__tests__/llmModels.test.ts src/app/api/llm/__tests__/route.test.ts src/components/__tests__/LLMGenerateNode.test.tsx src/store/utils/__tests__/nodeDefaults.test.ts

Tested: npm run build

Tested: git diff --check

src/app/api/llm/__tests__/route.test.ts

@@ -313,6 +313,88 @@ describe("/api/llm route", () => {
     });
   });
 
+  describe("NewApiWG provider", () => {
+    beforeEach(() => {
+      global.fetch = mockFetch;
+    });
+
+    it("should use current Doubao Seed model ids for NewApiWG", async () => {
+      mockFetch.mockResolvedValueOnce({
+        ok: true,
+        json: () =>
+          Promise.resolve({
+            choices: [{ message: { content: "Doubao response text" } }],
+          }),
+      });
+
+      const request = createMockPostRequest(
+        {
+          prompt: "Test prompt",
+          provider: "newapiwg",
+          model: "doubao-seed-2-0-lite-260428",
+          temperature: 0.7,
+          maxTokens: 1024,
+        },
+        {
+          "X-NewApiWG-Key": "test-newapiwg-key",
+          "X-NewApiWG-Base-URL": "https://newapi.example/v1",
+        }
+      );
+
+      const response = await POST(request);
+      const data = await response.json();
+
+      expect(response.status).toBe(200);
+      expect(data.success).toBe(true);
+      expect(data.text).toBe("Doubao response text");
+      expect(mockFetch).toHaveBeenCalledWith(
+        "https://newapi.example/v1/chat/completions",
+        expect.objectContaining({
+          body: JSON.stringify({
+            model: "doubao-seed-2-0-lite-260428",
+            messages: [{ role: "user", content: "Test prompt" }],
+            temperature: 0.7,
+            max_tokens: 1024,
+          }),
+        })
+      );
+    });
+
+    it("should map legacy Doubao selector values to available gateway model ids", async () => {
+      mockFetch.mockResolvedValueOnce({
+        ok: true,
+        json: () =>
+          Promise.resolve({
+            choices: [{ message: { content: "Legacy Doubao response text" } }],
+          }),
+      });
+
+      const request = createMockPostRequest(
+        {
+          prompt: "Test prompt",
+          provider: "newapiwg",
+          model: "Doubao-Seed-2.0-lite",
+        },
+        {
+          "X-NewApiWG-Key": "test-newapiwg-key",
+          "X-NewApiWG-Base-URL": "https://newapi.example/v1",
+        }
+      );
+
+      const response = await POST(request);
+      const data = await response.json();
+
+      expect(response.status).toBe(200);
+      expect(data.success).toBe(true);
+      expect(mockFetch).toHaveBeenCalledWith(
+        "https://newapi.example/v1/chat/completions",
+        expect.objectContaining({
+          body: expect.stringContaining('"model":"doubao-seed-2-0-lite-260428"'),
+        })
+      );
+    });
+  });
+
   describe("OpenAI provider", () => {
     beforeEach(() => {
       global.fetch = mockFetch;

src/app/api/llm/route.ts

@@ -30,6 +30,11 @@ const ANTHROPIC_MODEL_MAP: Record<string, string> = {
   "claude-opus-4.6": "claude-opus-4-6",
 };
 
+const NEWAPIWG_LLM_MODEL_ALIASES: Record<string, string> = {
+  "Doubao-Seed-2.0-lite": "doubao-seed-2-0-lite-260428",
+  "Doubao-Seed-2.0-pro": "doubao-seed-2-0-pro-260215",
+};
+
 type GoogleContentPart =
   | { inlineData: { mimeType: string; data: string } }
   | { fileData: { mimeType: string; fileUri: string } }
@@ -246,6 +251,7 @@ async function generateWithNewApiWG(
   }
 
   const content = buildChatContent(prompt, images, videos);
+  const modelId = NEWAPIWG_LLM_MODEL_ALIASES[model] ?? model;
 
   const startTime = Date.now();
   const response = await fetch(`${normalizeNewApiWGBaseUrl(userBaseUrl)}/chat/completions`, {
@@ -255,7 +261,7 @@ async function generateWithNewApiWG(
       "Authorization": `Bearer ${apiKey}`,
     },
     body: JSON.stringify({
-      model,
+      model: modelId,
       messages: [{ role: "user", content }],
       temperature,
       max_tokens: maxTokens,

src/components/__tests__/LLMGenerateNode.test.tsx

@@ -54,7 +54,7 @@ describe("LLMGenerateNode", () => {
     inputVideos: [],
     outputText: null,
     provider: "newapiwg",
-    model: "Doubao-Seed-2.0-lite",
+    model: "doubao-seed-2-0-lite-260428",
     temperature: 1.0,
     maxTokens: 2048,
     status: "idle",

src/lib/__tests__/llmModels.test.ts

@@ -12,12 +12,12 @@ describe("LLM model options", () => {
       label: "GPT-4.1 Mini",
     });
     expect(LLM_MODELS.newapiwg).toContainEqual({
-      value: "Doubao-Seed-2.0-lite",
-      label: "Doubao-Seed-2.0-lite",
+      value: "doubao-seed-2-0-lite-260428",
+      label: "Doubao Seed 2.0 Lite",
     });
     expect(LLM_MODELS.newapiwg).toContainEqual({
-      value: "Doubao-Seed-2.0-pro",
-      label: "Doubao-Seed-2.0-pro",
+      value: "doubao-seed-2-0-pro-260215",
+      label: "Doubao Seed 2.0 Pro",
     });
   });
 });

src/lib/chat/tools.ts

@@ -59,7 +59,7 @@ AI video generation. Takes image + text inputs, outputs video. Only available wi
 ### LLM Text Generation
 AI text generation for expanding prompts or analyzing images.
 - **Provider dropdown**: NewApiWG, Google, OpenAI, or Anthropic
-- **Model dropdown**: GPT-4.1 Mini (NewApiWG default), Doubao-Seed-2.0-lite/pro (NewApiWG options) / Gemini 3 Flash, Gemini 2.5 Flash, Gemini 3.0 Pro (Google) / GPT-4.1 Mini, GPT-4.1 Nano (OpenAI)
+- **Model dropdown**: GPT-4.1 Mini (NewApiWG default), Doubao Seed 2.0 Lite/Pro (NewApiWG options) / Gemini 3 Flash, Gemini 2.5 Flash, Gemini 3.0 Pro (Google) / GPT-4.1 Mini, GPT-4.1 Nano (OpenAI)
 - **Parameters** (collapsible): Temperature slider (0-2), Max Tokens slider (256-16384)
 - Takes **text** input (required), optional **image** input
 

src/lib/llmModels.ts

@@ -17,8 +17,8 @@ export const LLM_PROVIDERS: { value: LLMProvider; label: string }[] = [
 export const LLM_MODELS: Record<LLMProvider, LLMModelOption[]> = {
   newapiwg: [
     { value: "gpt-4.1-mini", label: "GPT-4.1 Mini" },
-    { value: "Doubao-Seed-2.0-lite", label: "Doubao-Seed-2.0-lite" },
-    { value: "Doubao-Seed-2.0-pro", label: "Doubao-Seed-2.0-pro" },
+    { value: "doubao-seed-2-0-lite-260428", label: "Doubao Seed 2.0 Lite" },
+    { value: "doubao-seed-2-0-pro-260215", label: "Doubao Seed 2.0 Pro" },
   ],
   google: [
     { value: "gemini-3-flash-preview", label: "Gemini 3 Flash" },

src/types/providers.ts

@@ -47,6 +47,8 @@ export type LLMModelType =
   | "gemini-3-flash-preview"
   | "gemini-3-pro-preview"
   | "gemini-3.1-pro-preview"
+  | "doubao-seed-2-0-lite-260428"
+  | "doubao-seed-2-0-pro-260215"
   | "Doubao-Seed-2.0-lite"
   | "Doubao-Seed-2.0-pro"
   | "gpt-4.1-mini"