diff --git a/packages/contracts/src/model.ts b/packages/contracts/src/model.ts
index 7788eaace48..9d7d46e789a 100644
--- a/packages/contracts/src/model.ts
+++ b/packages/contracts/src/model.ts
@@ -166,6 +166,9 @@ export const MODEL_SLUG_ALIASES_BY_PROVIDER: Partial<
     "gpt-5.3-spark": "gpt-5.3-codex-spark",
   },
   [CLAUDE_DRIVER_KIND]: {
+    fable: "claude-fable-5",
+    "fable-5": "claude-fable-5",
+    "claude-fable": "claude-fable-5",
     opus: "claude-opus-4-8",
     "opus-4.8": "claude-opus-4-8",
     "claude-opus-4.8": "claude-opus-4-8",
diff --git a/packages/shared/src/model.test.ts b/packages/shared/src/model.test.ts
index 00c01616005..2a08d5ec250 100644
--- a/packages/shared/src/model.test.ts
+++ b/packages/shared/src/model.test.ts
@@ -75,6 +75,8 @@ describe("normalizeModelSlug", () => {
     const claude = ProviderDriverKind.make("claudeAgent");
     expect(normalizeModelSlug("gpt-5-codex")).toBe("gpt-5.4");
     expect(normalizeModelSlug("5.3")).toBe("gpt-5.3-codex");
+    expect(normalizeModelSlug("fable", claude)).toBe("claude-fable-5");
+    expect(normalizeModelSlug("fable-5", claude)).toBe("claude-fable-5");
     expect(normalizeModelSlug("sonnet", claude)).toBe("claude-sonnet-4-6");
   });
 
@@ -110,6 +112,7 @@ describe("resolveSelectableModel", () => {
   it("resolves exact slugs, labels, and aliases", () => {
     const options = [
       { slug: "gpt-5.3-codex", name: "GPT-5.3 Codex" },
+      { slug: "claude-fable-5", name: "Claude Fable 5" },
       { slug: "claude-sonnet-4-6", name: "Claude Sonnet 4.6" },
     ];
     expect(resolveSelectableModel(ProviderDriverKind.make("codex"), "gpt-5.3-codex", options)).toBe(
@@ -121,6 +124,9 @@ describe("resolveSelectableModel", () => {
     expect(resolveSelectableModel(ProviderDriverKind.make("claudeAgent"), "sonnet", options)).toBe(
       "claude-sonnet-4-6",
     );
+    expect(resolveSelectableModel(ProviderDriverKind.make("claudeAgent"), "fable", options)).toBe(
+      "claude-fable-5",
+    );
   });
 });