Overview
Vercel AI SDK — Best TypeScript SDK for streaming AI UIs in Next.js.
The Vercel AI SDK provides unified TypeScript APIs for building streaming AI UIs across providers (OpenAI, Anthropic, Google, Mistral). It includes hooks for React, server actions, and multi-step agent support.
Unified API across 20+ LLM providers
Streaming with React hooks (useChat, useCompletion)
Server Actions for Next.js
Structured output with Zod validation
Features & capabilities
Everything it does, in plain English.
FeatureUnified API across 20+ LLM providersIncluded
FeatureStreaming with React hooks (useChat, useCompletion)Included
FeatureServer Actions for Next.jsIncluded
FeatureStructured output with Zod validationIncluded
FeatureTool calling and multi-step agentsIncluded
FeatureImage and text generationIncluded
PlatformsJavaScript/TypeScript · Next.js
The honest take
Where it shines, where it stumbles.
✓ Pros
- ✓Best DX for Next.js AI development
- ✓Abstracts provider differences cleanly
- ✓Excellent streaming support
! Watch-outs
- !React-focused — less useful for other frameworks
- !Frequent API changes across versions
Who it's for
Where Vercel AI SDK pays for itself fast.
— Use case
Build streaming chat UI in Next.js
— Use case
Create multi-model AI applications
— Use case
Generate structured data from LLMs
— Use case
Implement AI-powered search and RAG
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