LangChain vs AI SDK
LangChain (LangChain) and AI SDK (Vercel) side by side on public data, as of Oct 6, 2026.
LangChain has 1.3x the weekly package downloads of AI SDK (44.3M against 34.5M). LangChain has 5.4x the GitHub stars of AI SDK (147K against 27.1K). Over the last 30 days downloads moved -22% for LangChain and +21% for AI SDK. LangChain shipped 14 stable releases in the past 90 days.
Side-by-side numbers
| Metric | LangChain | AI SDK |
|---|---|---|
| Pulse Score | 77 | 67 |
| Overall rank | #4 | #11 |
| Downloads, last 7 days | 44.3M | 34.5M |
| Downloads, 7-day change | up 1.9% | up 13.5% |
| Downloads, 30-day change | down 22.0% | up 20.9% |
| VS Code installs | — | — |
| Marketplace rating | — | — |
| GitHub stars | 147K | 27.1K |
| Homebrew installs, 30 days | — | — |
| Hacker News mentions, 30 days | 73 | 6 |
| Latest stable release | 1.4.3 · 8d ago | 6.0.301 · yesterday |
| Stable releases, 90 days | 14 | |
| Terminal-Bench (best run) | — | — |
| Price | Free (OSS) | Free (OSS) |
| License | MIT | Apache-2.0 |
| First released | — | — |
| Interfaces | Python library, JavaScript library | TypeScript library |
| Models |
Trends
LangChain
A framework for building LLM applications and agents from composable parts: model integrations, tools, retrievers and prebuilt agent abstractions. Available for Python and JavaScript.
Pricing: LangChain is open source and free to use; you pay only for the models and infrastructure it runs on.
Latest release 1.4.3:
- Changes since langchain==1.4.2
- release(langchain): 1.4.3 (#40888) fix(langchain): sanitize cache settings for fallback models (#40886) feat(langchain): support Bedrock Mantle chat models in initchatmodel (#40837)…
AI SDK
Vercel's TypeScript toolkit for building AI applications and agents, with one API across model providers and UI helpers for streaming.
Pricing: AI SDK is open source and free to use; you pay only for the models and infrastructure it runs on.
Latest release 6.0.301:
- Updated dependencies [3824c69]
- Updated dependencies [6e8ec70]
- @ai-sdk/gateway@3.0.210