diff --git a/pydantic_ai_slim/pydantic_ai/providers/anthropic.py b/pydantic_ai_slim/pydantic_ai/providers/anthropic.py
index 95e032ad62..6c6df7598c 100644
--- a/pydantic_ai_slim/pydantic_ai/providers/anthropic.py
+++ b/pydantic_ai_slim/pydantic_ai/providers/anthropic.py
@@ -12,7 +12,7 @@
 from pydantic_ai.providers import Provider
 
 try:
-    from anthropic import AsyncAnthropic, AsyncAnthropicBedrock
+    from anthropic import AsyncAnthropic, AsyncAnthropicBedrock, AsyncAnthropicVertex
 except ImportError as _import_error:
     raise ImportError(
         'Please install the `anthropic` package to use the Anthropic provider, '
@@ -20,7 +20,7 @@
     ) from _import_error
 
 
-AsyncAnthropicClient: TypeAlias = AsyncAnthropic | AsyncAnthropicBedrock
+AsyncAnthropicClient: TypeAlias = AsyncAnthropic | AsyncAnthropicBedrock | AsyncAnthropicVertex
 
 
 class AnthropicProvider(Provider[AsyncAnthropicClient]):