langchain-classic==1.0.5

LangChain Releases / 5/4/2026

📰 NewsDeveloper Stack & InfrastructureTools & Practical UsageModels & Research

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Key Points

langchain-classic v1.0.5 was released with changes since v1.0.4, including a refactor and multiple maintenance updates.
The update retargets deprecated functionality toward the `create_agent` API, signaling a migration path for older agent-creation calls.
Additional refactoring/cleanup work (“other chores”) was included alongside the deprecation changes.
The release also adjusts optional dependencies by uncommenting them, likely improving install behavior or feature availability.
Several dependency version bumps (e.g., types-pyyaml, types-pytz, and notebook) were made to keep the langchain library ecosystem current.

Changes since langchain-classic==1.0.4

release(langchain-classic): 1.0.5 (#37165)
refactor(langchain-classic): retarget deprecations to create_agent, other chores (#37164)
chore(langchain,langchain-classic): uncomment optional deps (#37163)
chore: bump types-pyyaml from 6.0.12.20250915 to 6.0.12.20260408 in /libs/langchain (#37130)
chore: bump types-pytz from 2026.1.1.20260304 to 2026.1.1.20260408 in /libs/langchain (#37131)
chore: bump notebook from 7.4.5 to 7.5.6 in /libs/langchain (#37104)
release(perplexity): 1.2.0 (#37091)
chore(docs): update x handle references (#37081)
hotfix: bump min core versions (#36996)
release(openai): 1.2.1 (#36995)
feat(core): add content-block-centric streaming (v2) (#36834)
fix(fireworks): honor max_retries (#36973)
release(openai): 1.2.0 (#36961)
chore: bump nbconvert from 7.17.0 to 7.17.1 in /libs/langchain (#36922)
chore: bump langsmith from 0.7.13 to 0.7.31 in /libs/langchain (#36812)
release(core): release 1.3.0 (#36851)