gpt-oss-20b and gpt-oss-120b are now supported in Vercel AI Gateway

You can now access gpt-oss-20b and gpt-oss-120b by OpenAI, open-weight reasoning models designed to push the open model frontier, using Vercel's AI Gateway with no other provider accounts required.

AI Gateway lets you call the model with a consistent unified API and just a single string update, track usage and cost, and configure performance optimizations, retries, and failover for higher than provider-average uptime.

To use it with the AI SDK v5, start by installing the package:

pnpm i ai

Then set the model to either openai/gpt-oss-20b or openai/gpt-oss-120b:

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import { streamText } from 'ai'
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const result = streamText({
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  model: "openai/gpt-oss-120b", // or openai/gpt-oss-20b
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  prompt: "Generate an ansi animation of sutro tower" 
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})

Includes built-in observability, Bring Your Own Key support, and intelligent provider routing with automatic retries.

To deliver high performance and reliability to gpt-oss, AI Gateway leverages multiple model providers under the hood, including Groq, Baseten, Cerebras, and Huggingface.

Learn more about AI Gateway and view the new AI Gateway model leaderboard.