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fix(langchain): correctly initialize huggingface models in init_chat_model #33167

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Merged
merged 9 commits into from
Oct 21, 2025
Merged

fix(langchain): correctly initialize huggingface models in init_chat_model #33167

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b890e98
FIX: Correctly initialize HuggingFace models in init_chat_model
aaron-seq Sep 14, 2025
73d2bc7
WIP: Saving local changes
aaron-seq Sep 30, 2025
b695420
Merge branch 'master' of [https://github.com/langchain-ai/langchain](…
aaron-seq Sep 30, 2025
050fe45
Merge branch 'master' into fix/together-tool-message-format
aaron-seq Sep 30, 2025
8c07612
Merge branch 'master' into fix/together-tool-message-format
ccurme Oct 1, 2025
3dc1292
remove extraneous changes
ccurme Oct 1, 2025
8985edf
fix: resolve Ruff linting errors for HuggingFace model initialization
aaron-seq Oct 8, 2025
dd976ea
Merge branch 'master' into fix/together-tool-message-format
ccurme Oct 21, 2025
3bebbcd
nits
ccurme Oct 21, 2025
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7 changes: 5 additions & 2 deletions libs/langchain/langchain_classic/chat_models/base.py
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Original file line number Diff line number Diff line change
Expand Up @@ -406,11 +406,14 @@ def _init_chat_model_helper(
from langchain_mistralai import ChatMistralAI

return ChatMistralAI(model=model, **kwargs) # type: ignore[call-arg,unused-ignore]

if model_provider == "huggingface":
_check_pkg("langchain_huggingface")
from langchain_huggingface import ChatHuggingFace
from langchain_huggingface import ChatHuggingFace, HuggingFacePipeline

llm = HuggingFacePipeline.from_model_id(model_id=model, **kwargs)
return ChatHuggingFace(llm=llm)

return ChatHuggingFace(model_id=model, **kwargs)
if model_provider == "groq":
_check_pkg("langchain_groq")
from langchain_groq import ChatGroq
Expand Down