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Vercel AI SDK

Free
sdkaiopen-sourcejavascripttypescriptnext.jsreactchatbotstreamingllm

An open-source library for building conversational, streaming, and serverless AI applications, simplifying the integration of large language models into user interfaces built with modern JavaScript frameworks.

Try it out

The Vercel AI SDK is an open-source toolkit designed to help developers build AI-powered user interfaces with JavaScript and TypeScript. It simplifies the process of integrating large language models (LLMs) from providers like OpenAI, Anthropic, and Cohere into web applications. The SDK primarily serves web developers working with modern front-end frameworks like Next.js, Svelte, and Nuxt. Its unique value proposition lies in its focus on streaming UI responses, providing easy-to-use hooks and components to build chatbots and conversational interfaces that feel fast and responsive. By abstracting away the complexities of handling streaming data and serverless functions, it significantly accelerates the development of generative AI features.

Pros

  • Provides simple, composable React Hooks (`useChat`, `useCompletion`) that abstract away complex state management.
  • First-class support for streaming UI and text responses, enabling a fast, responsive user experience.
  • Model-agnostic design with built-in adapters for OpenAI, Anthropic, Hugging Face, Cohere, and more.
  • Seamless integration with the Next.js framework and Vercel's serverless and edge compute platforms.
  • Completely open-source with strong community backing and excellent documentation.

Cons

  • Heavily optimized for the Vercel platform, which can lead to vendor lock-in for deployment.
  • While supporting multiple frameworks, the best examples and deepest support are centered on Next.js.
  • Primarily focused on text-based generation and chat; less built-in support for multimodal (image, audio) AI tasks.
  • Requires a solid understanding of modern JavaScript, React/Svelte/Vue, and serverless function concepts.

Key features

  • Simple hooks for chat and text completion (`useChat`, `useCompletion`)
  • First-class support for streaming UI and text with React Server Components
  • Backend helpers for Node.js, Edge, and serverless runtimes
  • Official UI components for React and Svelte
  • Model-agnostic adapters for major LLM providers
  • Tool & function calling support for models like GPT and Gemini
  • Framework-specific support for Next.js, SvelteKit, Nuxt, and Astro

Integrations

Next.jsSvelteKitNuxtAstroOpenAIAnthropicGoogle GeminiHugging FaceLangChainCohere

Target audience

Front-end and full-stack web developers, particularly those using JavaScript frameworks like Next.js, Svelte, and Nuxt, who want to build AI-powered applications and conversational user interfaces.

Ratings & Reviews

0.0

Based on 0 reviews

Key Metrics

Active Users

2M+ weekly downloads

Founded

2023

Headquarters

San Francisco, USA

Pricing Tiers

SDK License

The Vercel AI SDK is an open-source library (Apache 2.0 License) and is free to use in any project. Pricing below pertains to the Vercel hosting platform.

Free

Hobby

For personal projects & experimentation. Includes deployments via Git, vercel.app domains, and access to Vercel Functions and Edge Functions.

Free

Pro

For professional use and teams. Includes higher limits on bandwidth, build times, Functions, and collaborative features for teams.

$20/mo

Enterprise

For large organizations requiring advanced security, custom limits, dedicated support, and enterprise-grade features.

Custom

Frequently Asked Questions

Top Alternatives to Vercel AI SDK

LangChain.js

Choose LangChain for complex AI applications that require chaining multiple LLM calls, agents, and data sources, as it's a more comprehensive backend orchestration framework.

OpenAI Node.js SDK

Use the official OpenAI SDK for projects that only need to interact with OpenAI models and where you prefer to build all UI-related streaming and state logic from scratch.

hono.js

Opt for Hono if you need a lightweight, ultra-fast web framework for building AI backends that can run on any platform, including Cloudflare Workers, a popular alternative to Vercel's Edge Network.

Ready to get started?

Join thousands of users and see how Vercel AI SDK can transform your workflow today.

Visit Vercel AI SDK