diff --git a/apps/server/src/serverSettings.test.ts b/apps/server/src/serverSettings.test.ts
index 1cbd6c7bf813a692c2d98b09967089909c58d75b..26ae1dbc4ee0e7b0aa7d30247b379279e82b0cd0 100644
--- a/apps/server/src/serverSettings.test.ts
+++ b/apps/server/src/serverSettings.test.ts
@@ -809,6 +809,7 @@ it.layer(NodeServices.layer)("server settings", (it) => {
       });
 
       assert.equal(next.textGenerationModelSelection.instanceId, "claudeAgent");
+      assert.equal(next.textGenerationModelSelection.model, "claude-haiku-5-5");
     }).pipe(Effect.provide(layerServerSettings())),
   );
 
diff --git a/packages/contracts/src/model.ts b/packages/contracts/src/model.ts
index 3a863a1670c328505501c3095e255b4c7d430a31..9bf2f345e8e22b55a45efc5dca57b7e63ceafd4f 100644
--- a/packages/contracts/src/model.ts
+++ b/packages/contracts/src/model.ts
@@ -192,7 +192,7 @@ export const DEFAULT_TEXT_GENERATION_MODEL_BY_PROVIDER: Partial<
 > = {
   [CODEX_DRIVER_KIND]: DEFAULT_TEXT_GENERATION_MODEL,
   [ProviderDriverKind.make("antigravity")]: ANTIGRAVITY_DEFAULT_MODEL,
-  [CLAUDE_DRIVER_KIND]: "claude-haiku-4-5",
+  [CLAUDE_DRIVER_KIND]: "claude-haiku-5-5",
   [CURSOR_DRIVER_KIND]: "composer-2",
   [OPENCODE_DRIVER_KIND]: "openai/gpt-5",
 };