Vercel AI SDK

Pricing

• AI SDK - free and open source (Apache-2.0)
• Vercel AI Gateway (the default when you pass a model string) - free tier with $5/month credit on Free Tier eligible models, then pay-as-you-go credits at provider list rates with zero markup; bring-your-own-key on the paid tier
• Provider packages such as @ai-sdk/openai or @ai-sdk/anthropic - billed by each provider on your own API key

Install

npm install ai

npm install @ai-sdk/openai @ai-sdk/anthropic @ai-sdk/google

npx skills add vercel/ai

Models

Pass a provider/model string such as anthropic/claude-opus-5.5 or openai/gpt-6-astra to route through Vercel AI Gateway by default, or import a provider package (OpenAI, Anthropic, Google, xAI, Azure, Amazon Bedrock, Mistral, DeepSeek, Groq and more) to call it directly. HarnessAgent also runs agent harnesses such as Claude Code and Codex through the same stream primitives.

Recent changes

• Oct 16ai 7.0.143 adds experimental_lowMemory to streamText for single-consumer streaming without a replay buffer, and lets useChat() prerender by generating default chat IDs on first access.
• Aug 19@ai-sdk/workflow 2.0.0 moves to Workflow 5 and drops Workflow 4 support.

Sources: AI SDK introduction, AI SDK providers and models, vercel/ai README, vercel/ai releases, @ai-sdk/workflow 2.0.0 release, Vercel AI Gateway pricing

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