diff --git a/packages/ai/src/providers/anthropic-compatible.ts b/packages/ai/src/providers/anthropic-compatible.ts
index 56cc7cee32..93d1bac048 100644
--- a/packages/ai/src/providers/anthropic-compatible.ts
+++ b/packages/ai/src/providers/anthropic-compatible.ts
@@ -47,7 +47,7 @@ export const configure = (input: Config) => {
   })
   return {
     id: ProviderID.make(provider),
-    model: (modelID: string | ModelID) => route.model({ id: modelID }),
+    model: (modelID: string | ModelID) => route.model<AnthropicMessages.ProviderOptionsInput>({ id: modelID }),
     configure,
   }
 }
@@ -57,7 +57,10 @@ export const provider = {
   configure,
 }
 
-export const model: ProviderPackage.Definition<Settings>["model"] = (modelID, settings) => {
+export const model: ProviderPackage.Definition<Settings, AnthropicMessages.ProviderOptionsInput>["model"] = (
+  modelID,
+  settings,
+) => {
   if (settings.apiKey !== undefined && settings.authToken !== undefined)
     throw new Error("Anthropic-compatible apiKey cannot be combined with authToken")
   return configure({
diff --git a/packages/ai/test/provider-options/anthropic-compatible.types.ts b/packages/ai/test/provider-options/anthropic-compatible.types.ts
new file mode 100644
index 0000000000..3f7de8fd14
--- /dev/null
+++ b/packages/ai/test/provider-options/anthropic-compatible.types.ts
@@ -0,0 +1,13 @@
+import { LLM } from "../../src"
+import { AnthropicCompatible } from "../../src/providers"
+
+const model = AnthropicCompatible.configure({ baseURL: "https://example.com" }).model("claude")
+
+LLM.request({ model, prompt: "Hello", providerOptions: { anthropic: { effort: "high" } } })
+
+LLM.request({
+  model,
+  prompt: "Hello",
+  // @ts-expect-error Anthropic effort must be a string.
+  providerOptions: { anthropic: { effort: 1 } },
+})