From abb20f34ba8eb36fec9d96c22f183093b626da1b Mon Sep 17 00:00:00 2001
From: =?UTF-8?q?Aleix=20Conchillo=20Flaqu=C3=A9?= <aleix@daily.co>
Date: Fri, 20 Feb 2026 16:17:51 -0800
Subject: [PATCH] Update default Anthropic model to claude-sonnet-4-6

Update the default model in AnthropicLLMService and remove the
now-unnecessary explicit model from the function calling example.
---
 examples/foundational/14a-function-calling-anthropic.py | 5 +----
 src/pipecat/services/anthropic/llm.py                   | 4 ++--
 2 files changed, 3 insertions(+), 6 deletions(-)

diff --git a/examples/foundational/14a-function-calling-anthropic.py b/examples/foundational/14a-function-calling-anthropic.py
index 165d4b220..36030bc2b 100644
--- a/examples/foundational/14a-function-calling-anthropic.py
+++ b/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)
 
diff --git a/src/pipecat/services/anthropic/llm.py b/src/pipecat/services/anthropic/llm.py
index a21296fe3..e715c242d 100644
--- a/src/pipecat/services/anthropic/llm.py
+++ b/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.