What changed
OpenAI increased the Work and Codex usage included in Pro and Business Premium plans. Pro 100 and Pro 500 now include twice their previous Work and Codex allowance. OpenAI also cancelled the Pro 200 reduction it had announced in a September 29 email: subscribers who already had the higher allowance keep it, and from October 29 Pro 200 subscribers on the lower allowance get twice their previous allowance, bringing them to the same limit.
Who it affects
Pro 100, Pro 200 and Pro 500 subscribers, and Business Premium plans.
What to do
No action needed. If you downgraded or bought credits because of the announced Pro 200 cut, it’s worth rechecking whether you still need them.
Source: https://help.openai.com/en/articles/6825453-chatgpt-release-notes