GPT 5.6 is now available on AI Gateway in three models: Sol, Terra, and Luna. GPT 5.6 from OpenAI is now available on AI Gateway in a limited preview, across three models: Sol, Terra, and Luna. All three are stronger at agentic work across coding, biology, and cybersecurity, and are more token-efficient than the previous generation.
**Sol **(openai/gpt-5.6-sol
): the flagship, and the most capable of the three.
**Terra **(openai/gpt-5.6-terra
): a balanced model for everyday work, with performance comparable to the previous generation at half the cost.
**Luna **(openai/gpt-5.6-luna
): a fast, affordable model with strong capability at the lowest cost in the series.
To use GPT 5.6, set model
to one of the above slugs in the [AI SDK](https://ai-sdk.dev/):
You can also set [routing rules](https://vercel.com/docs/ai-gateway/models-and-providers/routing-rules) to switch to GPT 5.6 from other gateway models without touching your code.
AI Gateway provides a unified API for calling models, tracking usage and cost, and configuring retries, failover, and performance optimizations for higher-than-provider uptime. It includes built-in custom reporting, Zero Data Retention support, budgets for API keys, routing rules, and more.
AI Gateway reflects provider pricing with no markup and does not charge a platform fee on inference, including on Bring Your Own Key (BYOK) requests.
Try GPT 5.6 in the model playground.