

Free open-source TypeScript toolkit for building AI-powered applications with a unified API supporting 15+ providers including OpenAI, Anthropic, Google, and more. Created by the makers of Next.js for seamless AI integration.
The Vercel AI SDK is a free, open-source TypeScript toolkit that simplifies building AI applications by providing a unified API to interact with various large language models. Created by the team behind Next.js.
Supports Claude models with thinking/reasoning features, effort levels (high/medium/low), and provider-defined web search tools. Use model strings like 'anthropic/claude-opus-4.5'.
Seamless integration with Next.js, React, and other JavaScript frameworks. Works with vector databases for RAG applications.
Free and open-source. Pay only for underlying LLM API usage.
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