What It Is

AI SDK is an open-source, framework-agnostic TypeScript toolkit designed to help developers build AI-powered applications and agents across React, Next.js, Vue, Svelte, Node.js, and other frameworks. It provides a unified API layer that abstracts away the complexity of working with multiple AI providers, making it simple to integrate and switch between over 100 different language models.

Key Features & Capabilities

• Multi-Provider Support: Access 100+ models from providers like OpenAI, Anthropic, and others with a single, consistent API—switch providers with just one line of code • Built-in Streaming: Real-time response streaming that works out of the box without custom parsing logic • Automatic Fallbacks: Production-ready reliability with built-in fallback behavior when primary models fail • AI SDK Core: Unified API for text generation, structured objects, tool calls, and building autonomous agents • AI SDK UI: Framework-agnostic hooks for quickly building chat and generative user interfaces • Tool Calling: Native support for function calling and tool integration • Error Handling: Robust error management for production deployments • DevTools: Development tools for debugging and monitoring AI interactions

Who It's For

AI SDK is built for developers and engineering teams building production AI applications—from simple chatbots to complex multi-agent systems. Whether you're a platform engineer needing reliable infrastructure, a design engineer creating AI-native interfaces, or a team building full-featured AI agents with multi-step reasoning, AI SDK provides the foundational tools you need.

Ecosystem & Integrations

The SDK integrates seamlessly with Vercel's broader AI ecosystem, including AI Gateway for unified model access without managing multiple API keys, Vercel Sandbox for secure code execution at scale, and Workflows for building long-running agents that can suspend, resume, and survive function timeouts. With 14.2M weekly downloads, 24.7K GitHub stars, and 600+ contributors, AI SDK has become a trusted foundation for production AI applications.

What Makes It Different

Unlike provider-specific SDKs, AI SDK offers true provider portability—write your code once and easily switch between models or add fallback providers. The framework handles the hard problems like streaming management, tool call repair, message state, and tool-based UI through clean, well-designed APIs that feel native to your chosen framework.