GPT-5.6 launched and developers immediately hit their usage limits. The fix is not a bigger plan

OpenAI's Codex team hosts Reddit AMA on GPT-5.6 features as AI coding wars heat up

OpenAI launched GPT-5.6 with Sol, Terra, and Luna tiers, integrated Codex into ChatGPT, and hosted a Reddit AMA as weekly users surpassed 5 million.