The AI SDK is an open-source TypeScript toolkit created by Vercel that simplifies building AI-powered applications, agents, and generative user interfaces. It provides a unified abstraction layer over multiple large language model providers, allowing developers to work with different models (such as OpenAI, Anthropic, Google, and others) using a consistent API.

The SDK is designed to reduce the complexity of integrating AI into modern applications by standardizing common tasks like text generation, structured object output, tool calling, streaming responses, and agent workflows. It is commonly used with React, Next.js, Vue, Svelte, and Node.js.

The AI SDK is split into two main parts: a core library for server-side AI logic and a UI library that provides framework-agnostic hooks for building chat interfaces and generative UI experiences. It is tightly integrated with the Vercel ecosystem and is often used alongside Next.js and serverless or edge deployments.

In addition to text generation, the SDK supports advanced AI patterns such as multi-step tool execution, streaming UI updates, structured outputs, and model switching across providers. It is positioned as a developer-first abstraction layer for production-grade AI applications.

Key features include:

• Unified API for multiple LLM providers (OpenAI, Anthropic, Google, etc.)
• Streaming text, object, and tool-call responses
• Built-in support for AI agents and tool execution workflows
• Framework-agnostic UI hooks for chat and generative interfaces
• Tight integration with Next.js and Vercel infrastructure

Common use cases include:

• Building AI chatbots
• Developing agent-based workflows
• Creating RAG applications
• Powering generative UI features
• Integrating LLM capabilities into web and server applications

The AI SDK is developed and maintained by Vercel as part of its broader AI tooling ecosystem for modern web development.