Add Claude Fable 5 model

Author: mikecann

runner/models.test.ts

@@ -32,6 +32,7 @@ describe("ALL_MODELS", () => {
     expect(ALL_MODELS).toContain("anthropic/claude-opus-4.6");
     expect(ALL_MODELS).toContain("anthropic/claude-opus-4.7");
     expect(ALL_MODELS).toContain("anthropic/claude-opus-4.8");
+    expect(ALL_MODELS).toContain("anthropic/claude-fable-5");
     expect(ALL_MODELS).toContain("deepseek/deepseek-v4-pro");
     expect(ALL_MODELS).toContain("moonshotai/kimi-k2.6");
     expect(ALL_MODELS).toContain("google/gemini-2.5-flash");

runner/models/index.ts

@@ -40,6 +40,7 @@ export const ALL_MODELS: string[] = [
   "anthropic/claude-opus-4.6",
   "anthropic/claude-opus-4.7",
   "anthropic/claude-opus-4.8",
+  "anthropic/claude-fable-5",
   "openai/o4-mini",
   "openai/gpt-4.1",
   "openai/gpt-5.1",