GPT 5.6 Sol, Luna, and Terra now available on AI Gateway

OpenAI released GPT 5.6 in three models—Sol, Terra, and Luna—now available on Vercel's AI Gateway. The models offer improved agentic capabilities in coding, biology, and cybersecurity with greater token efficiency. AI Gateway provides unified API access, cost tracking, and performance optimizations without markup.

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 .