Dec 5, 2024 · recalled
ChatGPT Pro launches at $200/mo
First flat-rate tier priced for heavy users; the template for 'unlimited-ish' power plans.
May 16, 2025 · recalled
Codex arrives in ChatGPT
Coding agent rolls out to paid ChatGPT tiers; now included from Free through Enterprise.
2026 · fetched
ChatGPT adds Go ($8) and splits Pro into $100 / $200 / $500
Pro $500 adds Ultrafast mode; Plus publishes per-5-hour message ranges.
Oct 14, 2026 · fetched · upcoming
Upcoming: GPT-5.5 retires from ChatGPT and Codex
API unaffected.
Nov 21, 2026 · fetched · upcoming
Upcoming: GPT-5.6 Sol promotional pricing ends (at the earliest)
Promo runs 'at least through' this date.