UPDATE / 更新 — 30 October 2026: This letter is closed following Tibo’s 29 October announcement that Pro 200 Work and Codex usage will stay the same and Pro 100/200/500 and Business Premium limits would double. The text below is the historical record as of 21 October.
2026 年 10 月 30 日更新：根据 Tibo 10 月 29 日关于 Pro 200 额度保持不变及相关套餐额度翻倍的公告，公开信已完结。以下为 10 月 21 日的历史记录。
https://x.com/thsottiaux/status/2115850175868727621

An open letter on predictable subscription terms

https://omicachow.com/open-letter/openai-pro

https://omicachow.com/zh/open-letter/openai-pro



I stopped renewing $200/month ChatGPT Pro.

Support has replied, but the core issue remains: predictable recurring value and verifiable allowances.

My open letter, corrected timeline and three requests:
https://omicachow.com/open-letter/openai-pro



A correction to my earlier post: Support did reply. My policy concern remains unresolved. An exact 20×→10× explanation was later withdrawn, so I am not presenting a verified 50% cut. The full correspondence timeline is in the letter.



我认可 ChatGPT 和 Codex 的价值。我停止续订，是因为相同价格下经常性额度的降低，以及前后不一致的解释，削弱了我对这份订阅的信心。



Support has replied. The recurring-value concern remains unresolved. Exact 20×→10× figures were stated and later withdrawn in correspondence; they are not presented as independently established facts.