Ask ten developers "when does Codex reset" and you'll get three different answers — because Codex actually has three separate reset layers, and they run on different clocks. This guide untangles them, shows you where each layer's official status lives, and how to turn 53 tracked global resets into a usable prediction.
The three reset layers§
Codex usage is governed by three independent mechanisms. First, the 5-hour rolling window: a short-term burst allowance that continuously refills as older usage ages out of the window. Second, the weekly window: a larger quota that replenishes on a weekly cycle for your account. Third, and most famously, global resets: one-off events where the OpenAI Codex team announces on X that usage limits are reset for everyone — no action required on your part.
The first two layers are mechanical: they follow your account's usage timeline. The third is discretionary: the team triggers it to celebrate milestones, compensate for outages, or simply to be generous during a launch week. That's why no single clock answers the question — you need to know which layer you're asking about.
When does the weekly limit reset?§
The weekly window replenishes on a rolling weekly cycle tied to your account's usage history, not a fixed global hour like midnight on Sunday. In practice: your allowance for a given day reflects usage that occurred in the prior seven days. If you hammered Codex last Tuesday, that Tuesday's consumption frees up again the following Tuesday.
Two practical implications. If you spread heavy work across days instead of cramming it into one, your effective weekly ceiling is higher. And when someone says their weekly limit "reset early" or "keeps resetting", it's almost always the 5-hour window refilling — not the weekly one moving.
When do global resets happen?§
Global resets are announced on X by the Codex team and tracked by codex-resets.com. The archive now counts 53 tracked resets spanning September 2025 to September 2026. The average gap is about 6.9 days, but the spread is wild: back-to-back daily resets during the July 2026 spree, and stretches of two weeks with nothing.
They cluster around recognizable triggers: user milestones (3M, 7M, 8M, 10M, 25M), plan launches, outages and usage-accounting bugs, holidays, and launch weeks for new models like GPT-6 Astra. Reading the full reset history makes the rhythm intuitive fast.
How to predict the next reset§
Official announcements rarely come with lead time. The honest prediction method is base-rate reasoning: days since last reset ÷ average gap. Above roughly 90% of the average gap, you're inside the historical high-probability window — in every such stretch of the archive, a reset has tended to land soon after.
The homepage radar computes exactly that: a live pressure gauge (days since last reset vs. the 6.9-day average), a plain verdict (SEND IT when a reset is announced or the window is hot; pedal normal otherwise), and it flips to the exact official time the moment an announcement lands.
What time of day do resets land?§
Because global resets ride on team announcements, they land when the team posts — which historically skews to US working hours, i.e. early morning in Beijing time. The exact minute is whatever the announcement says; refills then propagate across accounts, usually completing within minutes to an hour.
Banked-reset drops are different: credits appear in eligible accounts and wait for you to redeem them, so "when" is up to you until they expire.
FAQFAQ
Does Codex reset at midnight?
No fixed midnight reset exists. The 5-hour window refills continuously as old usage ages out, the weekly window follows your account's rolling cycle, and global resets land whenever the team announces them.
How often does the global reset happen on average?
About every 6.9 days across 53 tracked resets (September 2025 – September 2026). The variance is large: from back-to-back days to two-week stretches.
Is the 5-hour limit still removed?
It was temporarily removed in July 2026. Its status has changed before and can change again — the live radar reflects current official signals, and the reset history documents each era.
Do I need to claim a global reset?
No. Global resets apply automatically to all paid accounts (Plus / Pro / Business) on Codex and ChatGPT Work. Banked reset credits are the exception — those you redeem manually.