# GPT 5.6 Sol, Luna, and Terra now available on AI Gateway > Source: > Published: 2026-07-09 00:00:00+00:00 GPT 5.6 is now available on [AI Gateway](https://vercel.com/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](https://vercel.com/changelog/custom-reporting-ai-gateway), [Zero Data Retention support](https://vercel.com/blog/zdr-on-ai-gateway), [budgets for API keys](https://vercel.com/docs/ai-gateway/authentication-and-byok/api-keys), [routing rules](https://vercel.com/docs/ai-gateway/models-and-providers/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](https://vercel.com/docs/ai-gateway/authentication-and-byok/byok) (BYOK) requests. Try GPT 5.6 in the [model playground](https://vercel.com/ai-gateway/models/gpt-5.6-sol).