github/langchain
1
0
Fork 0
mirror of https://github.com/hwchase17/langchain.git synced 2026-06-09 10:17:00 +00:00
Code Issues Packages Projects Releases Wiki Activity

fix(anthropic): drop forced tool_choice when thinking is enabled (#35544)

Browse Source
This commit is contained in:
Roli Bosch
2026-03-04 18:09:48 -08:00
committed by GitHub
parent c8f394208b
commit fb31c91076
2 changed files with 107 additions and 0 deletions
Download Patch File Download Diff File Expand all files Collapse all files

20
libs/partners/anthropic/langchain_anthropic/chat_models.py
View File

@@ -1567,6 +1567,26 @@ class ChatAnthropic(BaseChatModel):
msg,
)
# Anthropic API rejects forced tool use when thinking is enabled:
# "Thinking may not be enabled when tool_choice forces tool use."
# Drop forced tool_choice and warn, matching the behavior in
# _get_llm_for_structured_output_when_thinking_is_enabled.
if (
self.thinking is not None
and self.thinking.get("type") == "enabled"
and "tool_choice" in kwargs
and kwargs["tool_choice"].get("type") in ("any", "tool")
):
warnings.warn(
"tool_choice is forced but thinking is enabled. The Anthropic "
"API does not support forced tool use with thinking. "
"Dropping tool_choice to avoid an API error. Tool calls are "
"not guaranteed. Consider disabling thinking or adjusting "
"your prompt to ensure the tool is called.",
stacklevel=2,
)
del kwargs["tool_choice"]
if parallel_tool_calls is not None:
disable_parallel_tool_use = not parallel_tool_calls
if "tool_choice" in kwargs: