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AI SDK for TypeScript apps
The best AI SDK for TypeScript and Next.js apps is Vercel AI SDK because it scores highest on our published formula (80.8/100): Open-source TypeScript toolkit for streaming, tools and UI with many providers.
The job: “I'm adding AI features or agents to a TypeScript/Next.js app.” · Last checked
Vercel AI SDK
Open-source TypeScript toolkit for streaming, tools and UI with many providers.
Not for: Python backends.
Pricing: Open source TypeScript library. source, checked 2026-10-19
Visit Vercel AI SDK ↗Mastra
Open-source TypeScript agent framework with workflows and memory built in.
Not for: People who only need a thin model-calling layer.
Pricing: Open source TypeScript framework. source
Score breakdown
| Tool | Fit (editorial) ×0.4 | Adoption (GitHub stars) ×0.25 | Momentum (release freshness) ×0.2 | Attention (HN, 30d) ×0.15 | Score |
|---|---|---|---|---|---|
| Vercel AI SDK | 5/5 → 1 | 27.4k★ → 0.831 | Oct 19, 2026 → 1 | 0 pts → 0 | 80.8 |
| Mastra | 4/5 → 0.75 | 28.9k★ → 0.836 | Oct 15, 2026 → 0.956 | 0 pts → 0 | 70 |
Missing signals are dropped and the remaining weights re-normalized. See methodology. Signals fetched Oct 19, 2026.
FAQ
What is the best AI SDK for TypeScript and Next.js apps?
The best AI SDK for TypeScript and Next.js apps is Vercel AI SDK because it scores highest on our published formula (80.8/100): Open-source TypeScript toolkit for streaming, tools and UI with many providers.
What is the best alternative to Vercel AI SDK?
Our runner-up is Mastra (70/100). Open-source TypeScript agent framework with workflows and memory built in. Not for: People who only need a thin model-calling layer.
Who should not use Vercel AI SDK?
Python backends.
How much does Vercel AI SDK cost?
Open source TypeScript library. (checked 2026-10-19, source: https://github.com/vercel/ai)
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