diff --git a/packages/adapters/claude-local/src/index.ts b/packages/adapters/claude-local/src/index.ts
index fc20d2eab1..88fb662612 100644
--- a/packages/adapters/claude-local/src/index.ts
+++ b/packages/adapters/claude-local/src/index.ts
@@ -7,6 +7,7 @@ export const SANDBOX_INSTALL_COMMAND = "npm install -g @anthropic-ai/claude-code
 
 export const models = [
   { id: "claude-opus-4-8", label: "Claude Opus 4.8" },
+  { id: "claude-sonnet-5", label: "Claude Sonnet 5" },
   { id: "claude-fable-5", label: "Claude Fable 5" },
   { id: "claude-mythos-5", label: "Claude Mythos 5" },
   { id: "claude-opus-5", label: "Claude Opus 5" },
diff --git a/server/src/__tests__/adapter-models.test.ts b/server/src/__tests__/adapter-models.test.ts
index f7d28c3116..d60a73a353 100644
--- a/server/src/__tests__/adapter-models.test.ts
+++ b/server/src/__tests__/adapter-models.test.ts
@@ -65,6 +65,7 @@ describe("adapter model listing", () => {
     expect(models.some((model) => model.id === "claude-opus-4-8")).toBe(true);
     // Newer flagship models are offered, but Opus 4.8 stays the default (first) option.
     expect(models[0]?.id).toBe("claude-opus-4-8");
+    expect(models.some((model) => model.id === "claude-sonnet-5")).toBe(true);
     expect(models.some((model) => model.id === "claude-fable-5")).toBe(true);
     expect(models.some((model) => model.id === "claude-mythos-5")).toBe(true);
     // Opus 5 is a current GA flagship and must be offered even when live discovery is unavailable.