Merge pull request #3792 from pipecat-ai/aleix/update-anthropic-default-model

Update default Anthropic model to claude-sonnet-4-6

changelog/3792.changed.md

@@ -0,0 +1 @@
+- Updated default Anthropic model from `claude-sonnet-4-5-20250929` to `claude-sonnet-4-6`.

examples/foundational/14a-function-calling-anthropic.py

@@ -72,10 +72,7 @@ async def run_bot(transport: BaseTransport, runner_args: RunnerArguments):
         voice_id="71a7ad14-091c-4e8e-a314-022ece01c121",  # British Reading Lady
     )
 
-    llm = AnthropicLLMService(
-        api_key=os.getenv("ANTHROPIC_API_KEY"),
-        model="claude-3-7-sonnet-latest",
-    )
+    llm = AnthropicLLMService(api_key=os.getenv("ANTHROPIC_API_KEY"))
     llm.register_function("get_weather", get_weather)
     llm.register_function("get_restaurant_recommendation", fetch_restaurant_recommendation)
 

src/pipecat/services/anthropic/llm.py

@@ -184,7 +184,7 @@ class AnthropicLLMService(LLMService):
         self,
         *,
         api_key: str,
-        model: str = "claude-sonnet-4-5-20250929",
+        model: str = "claude-sonnet-4-6",
         params: Optional[InputParams] = None,
         client=None,
         retry_timeout_secs: Optional[float] = 5.0,
@@ -195,7 +195,7 @@ class AnthropicLLMService(LLMService):
 
         Args:
             api_key: Anthropic API key for authentication.
-            model: Model name to use. Defaults to "claude-sonnet-4-5-20250929".
+            model: Model name to use. Defaults to "claude-sonnet-4-6".
             params: Optional model parameters for inference.
             client: Optional custom Anthropic client instance.
             retry_timeout_secs: Request timeout in seconds for retry logic.