How to use GPT-5.6

Ben's Bites · 2 days ago

OpenAI released GPT-5.6 with three models (Luna, Terra, Sol) featuring five thinking levels plus a new Ultra mode, and merged the ChatGPT and Codex apps into a single application with a new ChatGPT Work mode. The three models have different strengths with Luna suited for simple tasks, Terra offering minor improvements over GPT-5.5, and Sol excelling at UI and writing, while usage limits are consumed significantly faster at higher thinking levels. Users should adjust their model and thinking level selections based on task complexity to avoid rapidly depleting their weekly usage allowances.