Vercel AI SDK
by Vercel
The de facto TypeScript SDK for AI apps. Streaming, tools, multi-model, and now an agent loop.
OSS
Vercel AI SDK
Added 17 May 2026
Overview
Vercel's AI SDK is the most-used TypeScript framework for AI apps. Generation, streaming, structured output, tool calling, and provider routing all unified. The agent layer (generateText with tools, plus the newer agent loop) makes building production multi-turn agents in a Next.js app a same-day project.
Best for
Best for
TypeScript teams shipping AI features in production
Use cases
- Build a chatbot or generation UI in any Next.js app
- Add tool-calling agents to existing TypeScript backends
- Provider-agnostic deploy across OpenAI, Anthropic, Google, and more
- Stream UI updates as an agent reasons and acts
Notes
Why it matters
If your stack is TypeScript, the AI SDK is the default. There is no second place worth debating in 2026.
How teams use it in production
Most teams start with simple generation and streaming, then add tools. Pull in a dedicated orchestrator like LangGraph only when the state model genuinely demands it.
What to watch
Vercel’s agent loop is the bet that you don’t need a separate framework for most agent work. Watch how that holds up as multi-agent demand grows.
Pros
- Best-in-class developer experience for streaming AI UIs
- Provider-agnostic, swap models without rewriting code
- Excellent docs, tight loops with Next.js
- Active development, weekly improvements
Cons
- TypeScript-only, no Python sibling
- Less opinionated agent orchestration than LangGraph
- Newer agent abstractions still maturing
Pairs with
Other entries in the index that connect to this one. Click through to see the chain.
Lovable
Lovable (Anton Osika)
AI app builder for non-engineers. Prompt your idea, get a running React app with Supabase wired in.
v0 by Vercel
Vercel
Generative UI inside Next.js. Describe an interface, get production-quality React + Tailwind + shadcn components.
Inngest
Inngest
Durable workflows for agents. Step functions, event-driven runs, retries, all without managing a queue.
Langfuse
Langfuse
Open-source LLM observability. Traces, evals, prompt management, all self-hostable.
Mastra
Mastra
TypeScript-first agent framework. Workflows, agents, tools, memory, evals, in one consistent shape.
Trigger.dev
Trigger.dev
Background jobs and long-running tasks for AI apps. Write functions, get durability, observability, and retries.