Issues

• vertexai: release a new version that includes the pyarrow constraint change (#1962)

  vertexai
  langchain-ai/langchain-google#2028 · Filter by author vserecun opened on Sep 28, 2026

• ChatVertexAI.with_structured_output returns None on MALFORMED_FUNCTION_CALL

  vertexai
  langchain-ai/langchain-google#2023 · Filter by author codechrl opened on Sep 26, 2026

• ChatGoogleGenerativeAI.bind_tools: integer enum in a tool schema raises an opaque pydantic ValidationError ("Input should be a valid string") that names no field

  buggenai
  Bug

  langchain-ai/langchain-google#2013 · Filter by author Jayantkhandebharad opened on Sep 16, 2026
  1

• ChatAnthropicVertex: temperature/top_p/top_k raise TypeError with anthropic SDK v1

  langchain-ai/langchain-google#2008 · Filter by author KyriosGN0 opened on Sep 15, 2026
  1

• ChatAnthropicVertex: streaming drops content_block_start for thinking/redacted_thinking, producing thinking blocks with no thinking field that break subsequent turns

  bugvertexai
  Bug

  langchain-ai/langchain-google#2005 · Filter by author aii-vtl opened on Sep 15, 2026

• ChatGoogleGenerativeAI on Vertex AI: thinking content leaks into JSON text part when using responseMimeType=application/json + thinkingConfig, corrupting structured output (misreported as MAX_TOKENS)

  buggenai
  Bug

  langchain-ai/langchain-google#2002 · Filter by author dfustes opened on Sep 11, 2026
  1

• URL Context retrieval statuses are missing from response metadata

  langchain-ai/langchain-google#2001 · Filter by author antonioalegria opened on Sep 10, 2026

• genai: Pydantic discriminated union tool schemas are converted to STRING

  langchain-ai/langchain-google#1998 · Filter by author victor-hits opened on Sep 9, 2026

• vertexai: _parse_chat_history_gemini merges a ToolMessage with the following HumanMessage into one user content (function_response + text), causing a 400 on Gemini 3.x

  langchain-ai/langchain-google#1995 · Filter by author iszhusy opened on Sep 7, 2026

• ChatGoogleGenerativeAI drops finish_message, the only diagnostic for a MALFORMED_FUNCTION_CALL candidate (ChatVertexAI includes it)

  buggenai
  Bug

  langchain-ai/langchain-google#1991 · Filter by author julian-pani opened on Sep 2, 2026
  1

• langchain-google-genai triggers Google SDK Automatic Function Calling (AFC) warnings

  buggenai
  Bug

  langchain-ai/langchain-google#1978 · Filter by author Mercyboy007 opened on Aug 29, 2026

• bug(genai): anyOf inside array items is silently dropped when nested under properties

  langchain-ai/langchain-google#1965 · Filter by author chesterXalan opened on Aug 26, 2026

• Surface Vertex usage_metadata.traffic_type on response_metadata in ChatGoogleGenerativeAI

  enhancementgenai
  Feature

  langchain-ai/langchain-google#1947 · Filter by author koenroelofs-taktile opened on Aug 17, 2026

• refactor(genai) : use Annotated and remove unnecessary Field ellipsis

  enhancementgenai
  Feature

  langchain-ai/langchain-google#1941 · Filter by author Priyanshu-pulak opened on Aug 14, 2026
  1

• genai: model_kwargs is never read, so unknown constructor kwargs are silently dropped

  genai
  langchain-ai/langchain-google#1938 · Filter by author axiom-of-choice opened on Aug 11, 2026
  1

• ChatAnthropicVertex: _format_messages_anthropic does not convert v1 content blocks back, so replaying a tool call fails with 400 invalid_request

  vertexai
  langchain-ai/langchain-google#1930 · Filter by author nicolas-ziegler-bayard opened on Aug 5, 2026
  2

• Reasoning tokens not reported in usage_metadata

  bugvertexai
  Bug

  langchain-ai/langchain-google#1928 · Filter by author philemon-otera opened on Aug 5, 2026
  1

• ClientError escapes unconverted from both streaming paths in ChatGoogleGenerativeAI

  langchain-ai/langchain-google#1923 · Filter by author ClayShentrup opened on Aug 3, 2026
  1

• genai: Key '$defs' is not supported in schema warning

  langchain-ai/langchain-google#1880 · Filter by author destrophix opened on Jul 6, 2026

• SerializeToJsonError when Gemini returns Infinity as a tool-call argument

  langchain-ai/langchain-google#1874 · Filter by author simonline opened on Jun 29, 2026
  1

• GoogleDriveLoader.load() fails with HTTP 400 for document_ids (invalid files.list query)

  langchain-ai/langchain-google#1867 · Filter by author lcmartinezdev opened on Jun 22, 2026
  1

• Thought signatures from image generation are not exposed via AIMessage.content_blocks

  buggenai
  Bug

  langchain-ai/langchain-google#1837 · Filter by author nhtgl opened on Jun 12, 2026

• VertexAISearchSummaryTool drops SummaryWithMetadata citations/references despite summary_include_citations=True

  langchain-ai/langchain-google#1836 · Filter by author glaziermag opened on Jun 10, 2026

• feat(genai): surface audio token counts in UsageMetadata for TTS models

  langchain-ai/langchain-google#1821 · Filter by author awg66 opened on Jun 2, 2026
  1

• Gemini list/dict tool arguments arrive as JSON-encoded strings instead of parsed values

  genaivertexai
  langchain-ai/langchain-google#1819 · Filter by author mdrxy opened on May 29, 2026