diff --git a/src/config/defaults.ts b/src/config/defaults.ts
index 99672ef1706..e19fc67ffbf 100644
--- a/src/config/defaults.ts
+++ b/src/config/defaults.ts
@@ -1,6 +1,6 @@
 import { DEFAULT_CONTEXT_TOKENS } from "../agents/defaults.js";
-import { normalizeProviderId } from "../agents/model-selection.js";
 import { normalizeProviderSpecificConfig } from "../agents/models-config.providers.policy.js";
+import { normalizeProviderId } from "../agents/provider-id.js";
 import { applyProviderConfigDefaultsWithPlugin } from "../plugins/provider-runtime.js";
 import { DEFAULT_AGENT_MAX_CONCURRENT, DEFAULT_SUBAGENT_MAX_CONCURRENT } from "./agent-limits.js";
 import { normalizeTalkConfig } from "./talk.js";
diff --git a/src/config/model-alias-defaults.test.ts b/src/config/model-alias-defaults.test.ts
index 666720a8638..df26f496e5f 100644
--- a/src/config/model-alias-defaults.test.ts
+++ b/src/config/model-alias-defaults.test.ts
@@ -1,8 +1,21 @@
-import { describe, expect, it } from "vitest";
+import { describe, expect, it, vi } from "vitest";
 import { DEFAULT_CONTEXT_TOKENS } from "../agents/defaults.js";
 import { applyModelDefaults } from "./defaults.js";
 import type { OpenClawConfig } from "./types.js";
 
+const { normalizeProviderSpecificConfigMock } = vi.hoisted(() => ({
+  normalizeProviderSpecificConfigMock: vi.fn((providerKey: string, provider: unknown) => {
+    if (providerKey !== "anthropic" || !provider || typeof provider !== "object") {
+      return provider;
+    }
+    return { ...(provider as Record<string, unknown>), api: "anthropic-messages" };
+  }),
+}));
+
+vi.mock("../agents/models-config.providers.policy.js", () => ({
+  normalizeProviderSpecificConfig: normalizeProviderSpecificConfigMock,
+}));
+
 describe("applyModelDefaults", () => {
   function buildProxyProviderConfig(overrides?: { contextWindow?: number; maxTokens?: number }) {
     return {