LangChain
VerifiedDeveloper Tools • USA
Tracked Changes
1
Pricing Shifts
0
Features & Launches
1
Last Verified Event
Aug 30, 2026
LangChain Chronological Timeline
2026
product launchAug 30, 2026
96% VerifiedLangChain Releases Version 0.3 with Native Pydantic v2 Integration and Python 3.9 Requirement
LangChain 0.3 transitions the framework to native Pydantic v2 support internally, removing legacy Pydantic v1 bridge imports. The release officially drops support for Python 3.8 and mandates Python 3.9 or higher.
Before: LangChain 0.2 supported Python 3.8 and relied on Pydantic v1 internal bridge imports (`pydantic.v1`), causing runtime type errors when combined with Pydantic v2 native applications.
After: LangChain 0.3 requires Python 3.9+ and natively uses Pydantic v2 across `langchain-core` and all standard integration packages without v1 fallback mechanisms.
Complete LangChain Change Log Index
| Date | Change Title | Type | Impact | Details |
|---|---|---|---|---|
| Aug 30, 2026 | LangChain Releases Version 0.3 with Native Pydantic v2 Integration and Python 3.9 Requirement | product_launch | 9/10 | View ➔ |