feat: add google credential support to ChatAnthropicVertex (langchain…

…-ai#377)

libs/vertexai/langchain_google_vertexai/model_garden.py

@@ -16,6 +16,7 @@
     Union,
 )
 
+from google.auth.credentials import Credentials
 from langchain_core.callbacks.manager import (
     AsyncCallbackManagerForLLMRun,
     CallbackManagerForLLMRun,
@@ -134,6 +135,7 @@ class ChatAnthropicVertex(_VertexAICommon, BaseChatModel):
     max_output_tokens: int = Field(default=1024, alias="max_tokens")
     access_token: Optional[str] = None
     stream_usage: bool = True  # Whether to include usage metadata in streaming output
+    credentials: Optional[Credentials] = None
 
     class Config:
         """Configuration for this pydantic object."""
@@ -156,12 +158,14 @@ def validate_environment(cls, values: Dict) -> Dict:
             region=values["location"],
             max_retries=values["max_retries"],
             access_token=values["access_token"],
+            credentials=values["credentials"],
         )
         values["async_client"] = AsyncAnthropicVertex(
             project_id=values["project"],
             region=values["location"],
             max_retries=values["max_retries"],
             access_token=values["access_token"],
+            credentials=values["credentials"],
         )
         return values
 

libs/vertexai/pyproject.toml

@@ -16,7 +16,7 @@ langchain-core = ">=0.2.9,<0.3"
 google-cloud-aiplatform = "^1.56.0"
 google-cloud-storage = "^2.17.0"
 # optional dependencies
-anthropic = { extras = ["vertexai"], version = ">=0.29.0,<1", optional = true }
+anthropic = { extras = ["vertexai"], version = ">=0.30.0,<1", optional = true }
 
 [tool.poetry.group.test]
 optional = true