Changes following review

Author: cbornet

libs/langchain_v1/langchain/chat_models/base.py

@@ -68,8 +68,8 @@ def init_chat_model(
 
     **Two main use cases:**
 
-    1. **Fixed model** - specify the model upfront and get a ready-to-use chat model.
-    2. **Configurable model** - choose to specify parameters (including model name) at
+    1. **Fixed model** – specify the model upfront and get a ready-to-use chat model.
+    2. **Configurable model** – choose to specify parameters (including model name) at
         runtime via `config`. Makes it easy to switch between models/providers without
         changing your code
 
@@ -295,7 +295,7 @@ class GetPopulation(BaseModel):
         # Use Sonnet 4.5
         ```
 
-    """  # noqa: E501
+    """  # noqa: E501,RUF002
     if not model and not configurable_fields:
         configurable_fields = ("model", "model_provider")
     config_prefix = config_prefix or ""

libs/langchain_v1/tests/integration_tests/agents/middleware/test_shell_tool_integration.py

@@ -17,7 +17,7 @@ def _get_model(provider: str) -> Any:
     if provider == "anthropic":
         from langchain_anthropic import ChatAnthropic
 
-        return ChatAnthropic(model="claude-3-5-sonnet-20241022")
+        return ChatAnthropic(model="claude-sonnet-4-5-20250929")
     if provider == "openai":
         from langchain_openai import ChatOpenAI