Adding a documented case to this request, because it just happened to me and I have the invoice to tie it to.
My weekly window (Codex, Work, Workspace Agents, ChatGPT for Excel) opened Aug 12 at 11:29 PM while my account was on Pro. My Pro period ended Aug 16 with the window already fully consumed. On Aug 17 I purchased Plus: 20 dollars, billing period Aug 17 to Sep 17. The window did not reset on purchase. It reset Aug 19 at 11:29 PM, on its original schedule.
Roughly 2.5 days of a paid month with zero agent capacity, and nothing at checkout warned me.
Two things made it worse in my case. First, usage I had burned under the Pro ceiling kept counting against the much smaller Plus ceiling after the plan change, so I arrived at Plus already over the limit. Second, the panel showed “Usage limit resets: No usage limit resets available at this time” and my credits balance was 0, so I could not buy an early reset either.
Your proposed wording is exactly right. I would extend it slightly: show the warning on new purchases and plan changes too, not only renewals, and include the reset date. In my case one sentence at checkout would have made me wait two days and buy with full information.
The line in your post I want to underline is this one: “If I had known this in advance, I might have chosen to subscribe with another account instead.” That is the real problem. A brand new account paying the same 20 dollars starts with a full window. An existing customer who has been paying continuously can pay the same price and get nothing for days. Whatever the intent, that outcome rewards churn and penalizes loyalty.
This is not isolated. Other reports of the same behavior, none of which has had a staff reply (I cannot post links yet as a new member, so these are titles and topic numbers)
“Pro downgrade to Plus but the coding limit is not replenish for Plus”, topic 1383180, Jun 9 2026. Same downgrade scenario, independently confirmed by a second user in that thread.
“Does renewing ChatGPT Pro reset the weekly usage limit?”, topic 1386247, Jul 10 2026. A customer asking, before purchasing, whether paying resets the limit. Never answered by anyone.
“Upgraded to Pro Plan - Codex Usage limits remain like Plus account”, topic 1380072. The same defect in the opposite direction.
On GitHub, in the openai/codex repo: issue 30816 (reset date shifted silently after subscribing to Plus), issue 27027 (weekly quota not reset in the June 4 unified reset, plus a metering anomaly on a Plus account), and issue 36246.
I filed my own case there as issue 39398 with the full timeline, and separately through billing support.
That second thread is the one I would flag hardest. A customer tried to find this out before paying, in OpenAI’s own forum, and there was nowhere to learn it. If the behavior is intended, it just needs to be documented somewhere a customer can read it before they pay.
To be precise, so nobody has to guess at scope: regular chat conversations were unaffected the whole time. Per the usage panel’s own wording, this limit covers Codex, Work, Workspace Agents and ChatGPT for Excel, and does not include chat.