OpenAI: GPT-5.6 Luna Pro
OpenAIllm
About
GPT-5.6 Luna Pro is the same underlying model as [GPT-5.6 Luna](https://openrouter.ai/openai/gpt-5.6-luna), served with `reasoning.mode` set to `pro` for higher-quality responses on complex tasks. Learn more in OpenAI's docs: https://developers.openai.com/api/docs/guides/reasoning#reasoning-mode
Try OpenAI: GPT-5.6 Luna Pro
Test this model in the Sandbase Playground with your own prompts.
Open in Playground