Codex limits: what's confirmed
What OpenAI has published about Codex usage limits on ChatGPT plans: its Codex pricing page, help center, Codex changelog and status page, plus named posts by OpenAI staff and OpenAI's official account on X. No third-party reporting, no guesses. Where OpenAI has not published a figure, we write not stated.
Short answer
- Plus and Standard Business have a five-hour limit; OpenAI publishes only estimated local messages per five hours, not fixed limits.
- Pro plans have no five-hour limit. Weekly limits may apply; their size is not stated.
- OpenAI staff have announced several full or banked resets since August 2026; see the limit reset log.
- Past the limit, Plus and Pro can buy credits; price per credit is not stated.
Five-hour limit (Plus and Business)
The estimates below show local messages per five-hour period for Plus and Standard Business.
| Model | Plus and Standard Business, local messages per 5 hours (estimate) | Source |
|---|---|---|
| GPT-6 Astra | 5-45 | Codex pricing, checked 2026-10-24 |
| GPT-6.1 Sol | 15-160 | Codex pricing, checked 2026-10-24 |
| GPT-6 Sol | 15-150 | Codex pricing, checked 2026-10-24 |
| GPT-6 Luna | 350-3,000 | Codex pricing, checked 2026-10-24 |
These estimates are not fixed message limits
Cloud tasks may use more of your allowance than local messages.
Pro plans and weekly limits
Pro plans currently have no five-hour limit.
Weekly limits may also apply.
The Pro 20X is quite precisely 20X the usage of the Plus subscription
in Codex they apply specifically to weekly usage limits
we’re introducing Pro 500—a new plan with our highest usage limits (25x Plus) and access to Ultrafast.
Size of any weekly limit, for any plan: not stated. Pro limits in absolute terms: not stated.
What uses the limit faster
Codex pricing, checked 2026-10-24: Fast mode uses included usage at 2.5x and purchased credits at 2x the Standard rate for the same model.Image generations use included limits ~3-5x faster on average
For plans that use shared allowances or credits, Codex, ChatGPT Work, ChatGPT for Excel, and Workspace Agents use a shared allowance and credit pool when those features are available on your plan.
auto-review safety checks are free and don’t count toward your plan’s usage limits.
Reports of limits draining faster
We've investigated a few messages about codex usage limits being different. That's not something we change without engaging the community and being transparent.
We do see that for some users the cache hit rate has been worse this week than the stable state the weeks before. This could explain that usage is draining somewhat faster for those users
We’ve found (a) some inefficiencies when using images in long sessions with multiple compactions (b) high p95+ usage for Computer History
The rest of those threads was not captured; what was fixed and when: not stated in the captured text.
At the limit
ChatGPT Plus and Pro users who reach their usage limit can purchase additional credits to continue working without needing to upgrade their existing plan.
Credit purchase prices and applicable discounts depend on your plan or agreement.
No. OpenAI Support does not reset ChatGPT or Codex usage limits.
Using a full banked reset refreshes your 5-hour and weekly Codex usage windows and changes your weekly reset date.
Price per credit: not stated.
Changelog and status page
Added rate-limit reset banking for Plus and Pro users, including one free reset at launch
Usage-limit explanations and reset times now appear directly in the chat.
We’re fully operational
The OpenAI status page tracks availability (Codex listed as a component) and does not report usage-limit changes.
What the sources don't say
- Weekly limit size for any Codex plan: not stated.
- Fixed (non-estimate) five-hour limits: not stated.
- Codex numbers for Free and Go: not stated.
- Pro $100/$200 limits as a multiple: only "20X" (Pro 20X) and "25x Plus" (Pro 500) are stated.
- Price per Codex credit: not stated.
Sources
- https://developers.openai.com/codex/changelog (checked 2026-10-26)
- https://developers.openai.com/codex/pricing (checked 2026-10-24)
- https://help.openai.com/en/articles/11369540-using-codex-with-your-chatgpt-plan (checked 2026-10-24)
- https://status.openai.com/ (checked 2026-10-26)
- https://x.com/OpenAI/status/2104993967985381673 (checked 2026-10-26)
- https://x.com/thsottiaux/status/2090675027670978569 (checked 2026-10-26)
- https://x.com/thsottiaux/status/2091033630147854385 (checked 2026-10-26)
- https://x.com/thsottiaux/status/2091407991736332689 (checked 2026-10-26)
- https://x.com/thsottiaux/status/2094254532020818191 (checked 2026-10-26)
See also: AI usage limit resets log · Codex limits: what's confirmed · Claude limits draining faster? What's confirmed · What each AI coding plan gets you. Something wrong? Dispute it; corrections are dated and appended.