OpenAI rolls out GPT-5.6 to ChatGPT and Codex in limited release

OpenAI is rolling out GPT-5.6, its next-generation model, just two months after releasing GPT-5.5. The update is being made available to ChatGPT and Codex users, but the rollout is more restricted than previous model upgrades. OpenAI has not detailed the differences between GPT-5.5 and GPT-5.6 or provided a timeline for a broader release.