What Vercel AI SDK does
The Vercel AI SDK is an open-source TypeScript toolkit for building AI-powered applications and agents. It provides a unified API for generating text, structured objects, and tool calls across many large language models, so developers can build production AI features, including streaming responses and agent workflows, without writing provider-specific integration code.
Key capabilities
The SDK supports 100+ LLM models from providers such as OpenAI, Anthropic, Google, Mistral, and Meta, letting teams switch models with minimal code changes. It includes built-in real-time streaming, reliable fallbacks and error handling, and tool calling for agent-based workflows. It is framework-agnostic, working with React, Next.js, Vue, Svelte, and Node.js, and supports multiple modalities including text, image, speech, transcription, and video generation.
Who it's for
The AI SDK is aimed at full-stack developers and AI engineers building chatbots, agents, and multimodal experiences, particularly teams on modern JavaScript and TypeScript frameworks that need multi-provider flexibility. It is widely adopted, with millions of weekly downloads.