OpenAI shipped GPT-5.6 (Sol/Terra/Luna) across the API, ChatGPT, and Codex, but the launch was as much a product reshuffle as a model drop. The same day, it merged Codex into a new ChatGPT desktop app with unified plugins, Sites (beta), multi-tab browsing, and faster computer use. Practitioners are impressed with Sol's coding and hard-context gains, but the restructuring drew sharp reactions.
Sol as "best at ~everything", the "generational fumble" critique, going all-in on Codex, Sol's 67.2% CursorBench score, the dollars-per-task pitch, and a two-month, 25B-token internal review.