OpenAI Unveils GPT-5.6 with Sol, Terra, Luna Tiers and Codex Merged into ChatGPT
On July 9, OpenAI released GPT‑5.6, introducing three tiered models—Sol, Terra, and Luna—with distinct pricing and performance, merging the standalone Codex app into ChatGPT, adding an ultra‑mode for multi‑agent collaboration, enhanced design capabilities, and showing benchmark gains over competitors.
