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Merged
merged 1 commit into from
Nov 7, 2025
Merged

fix(langchain): Update langchain-core dependency version #33775

merged 1 commit into from
Nov 7, 2025
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@mcavdar
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@mcavdar mcavdar commented Nov 1, 2025 •
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Description: langchain 1.0.3 requires langchain-core>=1.0.2, PR updated the dependency.
Issue: Fixes #33770

@github-actions github-actions bot added langchain Related to the package `langchain` dependencies Pull requests that update a dependency file v1 Issue specific to LangChain 1.0 fix labels Nov 1, 2025
@mcavdar mcavdar mentioned this pull request Nov 1, 2025
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@eyurtsev
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eyurtsev commented Nov 3, 2025

Hmm I don't think this should be required. Could you confirm what happens if you have langchain 1.0.3 and langchain_core 1.0? I'm wondering if maybe langchain_core was a different version?

@eyurtsev eyurtsev self-assigned this Nov 3, 2025
@mcavdar
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mcavdar commented Nov 3, 2025

hi @eyurtsev

what happens if you have langchain 1.0.3 and langchain_core 1.0?

I assume you meant langchain 1.0.3 and langchain_core 1.0.0. Here’s my test setup in a clean environment:

pip install langchain_core===1.0.0
pip install -U langchain

I’m still seeing the same issue: #33770

>>> from langchain.messages import AIMessage
Traceback (most recent call last):
  File "<stdin>", line 1, in <module>
  File "/home/mc/.venv-langchaing_test/lib/python3.10/site-packages/langchain/messages/__init__.py", line 12, in <module>
    from langchain_core.messages import (
ImportError: cannot import name 'InputTokenDetails' from 'langchain_core.messages' (/home/mc/.venv-langchaing_test/lib/python3.10/site-packages/langchain_core/messages/__init__.py)

$ pip freeze
...
langchain==1.0.3
langchain-core==1.0.0
...

Is this expected behavior? I have version 1.0.0 installed(both), and when I try to update langchain, it doesn’t update langchain_core:

pip install langchain_core===1.0.0
pip install langchain===1.0.0
pip install -U langchain

$ pip freeze
...
langchain==1.0.3
langchain-core==1.0.0
...

@github-actions github-actions bot added fix and removed fix labels Nov 3, 2025
ccurme
ccurme approved these changes Nov 7, 2025
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Issue was caused by #33692, we should have released core and bumped core version prior to subsequent release of langchain.

@ccurme ccurme merged commit 00cc9d4 into langchain-ai:master Nov 7, 2025
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dependencies Pull requests that update a dependency file fix langchain Related to the package `langchain` v1 Issue specific to LangChain 1.0

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cannot import AIMessage from langchain.messages

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@mcavdar @eyurtsev @ccurme