UPDATE: OpenAI Posts On X "The Codex promotion for existing Plus subscribers ends today and as a part of this, we're rebalancing Codex usage in Plus to support more sessions throughout the week, rather than longer sessions in a single day. The Plus plan will continue to be the best offer at $20 for steady, day-to-day usage of Codex, and the new $100 Pro tier offers a more accessible upgrade path for heavier daily use."