Default new agents to GPT-5.6 Luna Fast (#2683)

Co-authored-by: vercel-gh-bot-2[bot] <282331341+vercel-gh-bot-2[bot]@users.noreply.github.com>
Co-authored-by: AndrewBarba <1316152+AndrewBarba@users.noreply.github.com>

.changeset/default-model-gpt-5-6-luna-fast.md

@@ -0,0 +1,5 @@
+---
+"eve": patch
+---
+
+Use `openai/gpt-5.6-luna-fast` as the default model for config-less agents, new projects, and the setup model picker.

docs/agent-config.md

@@ -21,9 +21,7 @@ For a static AI Gateway model ID, you can make the same source change from the
 project root with `eve set --model anthropic/claude-opus-4.8` or from the local
 dev TUI with `/model anthropic/claude-opus-4.8`.
 
-The root `agent.ts` can be omitted when no runtime config is needed. eve then selects its default `agent.ts` source at the same slot, configured with `zai/glm-5.2`; authoring the file replaces that source. GLM 5.2 does not support image input; choose a
-vision-capable model or [route image inputs to Gemini
-Flash](./guides/dynamic-capabilities#route-image-inputs-to-a-vision-model).
+The root `agent.ts` can be omitted when no runtime config is needed. eve then selects its default `agent.ts` source at the same slot, configured with `openai/gpt-5.6-luna-fast`; authoring the file replaces that source.
 When `agent.ts` is present, `model` is required.
 
 A config that selects a static Gateway model is compile-only. A config that contains a dynamic model or a direct-provider `LanguageModel` remains a runtime entry because eve must resolve that authored value while the agent runs. See [Authored module lifecycle](./reference/typescript-api#authored-module-lifecycle).

docs/reference/cli.md

@@ -54,7 +54,7 @@ After scaffolding, a human terminal usually continues into `eve dev`. If a codin
 
 | Flag                   | Type   | Default          | Description                                                                                                              |
 | ---------------------- | ------ | ---------------- | ------------------------------------------------------------------------------------------------------------------------ |
-| `--model <model>`      | string | `zai/glm-5.2`    | Set the root agent's AI Gateway model ID.                                                                                |
+| `--model <model>`      | string | `openai/gpt-5.6-luna-fast` | Set the root agent's AI Gateway model ID.                                                                                |
 | `--reasoning <effort>` | enum   | provider default | Set reasoning to `none`, `minimal`, `low`, `medium`, `high`, or `xhigh`. `provider-default` leaves the field unauthored. |
 | `--channel-web-nextjs` | flag   | off              | Add the Web Chat app (Next.js). Not for existing projects — run `eve add channel/web` there instead.                     |
 

packages/eve/src/cli/commands/agent-instructions.test.ts

@@ -59,7 +59,7 @@ describe("initAgentInstructions", () => {
 describe("initAgentReadySummary", () => {
   it("reports the model and generated instructions path", () => {
     expect(stripAnsi(initAgentReadySummary(undefined, "/app"))).toBe(
-      "✓ Model zai/glm-5.2 (eve default)\n✓ Instructions /app/agent/instructions.md",
+      "✓ Model openai/gpt-5.6-luna-fast (eve default)\n✓ Instructions /app/agent/instructions.md",
     );
     expect(stripAnsi(initAgentReadySummary("openai/gpt-5.5", "/app"))).toContain(
       "✓ Model openai/gpt-5.5\n",

packages/eve/src/setup/boxes/select-model.test.ts

@@ -55,10 +55,10 @@ const CATALOG: GatewayCatalogModel[] = [
     tags: ["web-search"],
   },
   {
-    id: "zai/glm-5.2",
-    name: "GLM 5.2",
+    id: "openai/gpt-5.6-luna-fast",
+    name: "GPT-5.6 Luna Fast",
     type: "language",
-    owned_by: "zai",
+    owned_by: "openai",
     released: 100,
     tags: ["reasoning"],
   },
@@ -110,14 +110,14 @@ describe("modelOptionsFromCatalog", () => {
     const options = modelOptionsFromCatalog(CATALOG);
 
     expect(options.map((option) => option.value)).toEqual([
-      "zai/glm-5.2",
+      "openai/gpt-5.6-luna-fast",
       "zai/glm-4.6",
       "openai/gpt-5-mini",
     ]);
     expect(options.filter((option) => option.featured).map((o) => o.value)).toEqual([
-      "zai/glm-5.2",
+      "openai/gpt-5.6-luna-fast",
     ]);
-    expect(options[0]?.hint).toBe("Z.AI");
+    expect(options[0]?.hint).toBe("OpenAI");
   });
 
   it("falls back to the static shortlist without a catalog or matches", () => {
@@ -149,7 +149,7 @@ describe("selectModel box", () => {
     let captured: SingleSelectOptions<PrompterValue> | undefined;
     const { prompter } = createSelectPrompter((opts) => {
       captured = opts;
-      return "zai/glm-5.2";
+      return "openai/gpt-5.6-luna-fast";
     });
     const box = selectModel({ asker: interactiveAsker(prompter), deps: catalogDeps() });
 
@@ -157,16 +157,16 @@ describe("selectModel box", () => {
 
     expect(result.kind).toBe("done");
     if (result.kind !== "done") return;
-    expect(result.state.modelId).toBe("zai/glm-5.2");
+    expect(result.state.modelId).toBe("openai/gpt-5.6-luna-fast");
     expect(captured?.search).toBe(true);
     // The featured default remains first; the rest are newest release first.
     expect(captured?.options.map((option) => option.value)).toEqual([
-      "zai/glm-5.2",
+      "openai/gpt-5.6-luna-fast",
       "zai/glm-4.6",
       "openai/gpt-5-mini",
     ]);
     // Cursor defaults to the top catalog entry when no default is configured.
-    expect(captured?.initialValue).toBe("zai/glm-5.2");
+    expect(captured?.initialValue).toBe("openai/gpt-5.6-luna-fast");
   });
 
   it("orders the curated shortlist first, marks it featured, and pre-selects the default", async () => {
@@ -194,7 +194,7 @@ describe("selectModel box", () => {
     expect(result.kind).toBe("done");
     if (result.kind !== "done") return;
     expect(captured?.options.map((option) => option.value)).toEqual([
-      "zai/glm-5.2",
+      "openai/gpt-5.6-luna-fast",
       "anthropic/claude-opus-4.8",
       "zai/glm-4.6",
       "openai/gpt-5-mini",
@@ -202,7 +202,7 @@ describe("selectModel box", () => {
     // Only the curated entries are featured: the picker's default view shows
     // them alone, and scrolling or search surfaces the rest of the catalog.
     expect(captured?.options.filter((option) => option.featured).map((o) => o.value)).toEqual([
-      "zai/glm-5.2",
+      "openai/gpt-5.6-luna-fast",
       "anthropic/claude-opus-4.8",
     ]);
     expect(captured?.initialValue).toBe(DEFAULT_AGENT_MODEL_ID);

packages/eve/src/setup/boxes/select-model.ts

@@ -55,7 +55,7 @@ const FEATURED_MODEL_IDS: readonly string[] = [
 ];
 
 const FALLBACK_MODELS: SelectOption<string>[] = [
-  modelOption(DEFAULT_AGENT_MODEL_ID, "GLM 5.2", "Z.AI"),
+  modelOption(DEFAULT_AGENT_MODEL_ID, "GPT-5.6 Luna Fast", "OpenAI"),
   modelOption("anthropic/claude-opus-4.8", "Claude Opus 4.8", "Anthropic"),
   modelOption("openai/gpt-5.5", "GPT-5.5", "OpenAI"),
   modelOption("google/gemini-3.5", "Gemini 3.5", "Google", false),

packages/eve/src/setup/flows/model.test.ts

@@ -23,10 +23,10 @@ const APP_ROOT = "/app/my-agent";
 
 const CATALOG: GatewayCatalogModel[] = [
   {
-    id: "zai/glm-5.2",
-    name: "GLM 5.2",
+    id: "openai/gpt-5.6-luna-fast",
+    name: "GPT-5.6 Luna Fast",
     type: "language",
-    owned_by: "zai",
+    owned_by: "openai",
     tags: ["reasoning"],
   },
   {
@@ -433,7 +433,7 @@ describe("runModelFlow", () => {
     expect(captured?.model).toEqual({
       kind: "pick",
       options: expect.arrayContaining([
-        expect.objectContaining({ value: "zai/glm-5.2", featured: true }),
+        expect.objectContaining({ value: "openai/gpt-5.6-luna-fast", featured: true }),
         expect.objectContaining({ value: "anthropic/claude-sonnet-5" }),
         expect.objectContaining({ value: "test/no-frills" }),
       ]),

packages/eve/src/shared/default-agent-model.ts

@@ -2,4 +2,4 @@
  * Model used when an agent does not declare one, baked in by `eve init`, and
  * pre-selected in the setup model picker.
  */
-export const DEFAULT_AGENT_MODEL_ID = "zai/glm-5.2";
+export const DEFAULT_AGENT_MODEL_ID = "openai/gpt-5.6-luna-fast";

packages/eve/test/scenarios/compile-agent.scenario.test.ts

@@ -47,7 +47,7 @@ const ROOT_TYPE_DEFINITIONS = fileURLToPath(
 const TSC_BIN_PATH = fileURLToPath(
   new URL("../../../../node_modules/typescript/bin/tsc", import.meta.url),
 );
-const DEFAULT_AGENT_MODEL_ID = "zai/glm-5.2";
+const DEFAULT_AGENT_MODEL_ID = "openai/gpt-5.6-luna-fast";
 
 function applicationOwnedEntries<TEntry extends { readonly sourceId: string }>(
   manifest: CompiledAgentManifest,

packages/eve/test/setup/mock-ai-gateway.ts

@@ -69,6 +69,7 @@ function collectGatewayModelIds(rootPaths: readonly string[]): ReadonlySet<strin
     "anthropic/claude-opus-4.7",
     "anthropic/claude-sonnet-5",
     "zai/glm-5.2",
+    "openai/gpt-5.6-luna-fast",
     "openai/gpt-5.4",
     "openai/gpt-5.4-mini",
   ]);