OpenAI: ChatGPT Free Users Can Now Use GPT-5.6 Luna Unlimitedly, Astra Delayed

Odaily News: AI company OpenAI announced that ChatGPT free users and users on the low-cost Go plan can now use the lightweight GPT-5.6 model Luna without limits, but only for text conversations. File uploads, image generation, and voice conversations will still be subject to existing usage limits.

GPT-5.6 Luna is the fastest but relatively lower-performing model in the GPT-5.6 series, and it now includes a new "Think" option that allows for extended reasoning time. OpenAI has also improved GPT-5.6's top-tier model Sol for Plus and Pro users, enhancing the reliability of factual information such as numbers, dates, and sources.

OpenAI has also decided to postpone the release of its next-generation model, Astra. Internal evaluations of this model have shown strong capabilities in coding and cybersecurity, potentially reaching a "dangerous" rating. Internal activities have been temporarily paused as enhanced safety standards have not yet been finalized.