OpenAI Codex usage limits explained
Short answerOpenAI Codex: Codex shares the plan allowance. Five-hour window plus weekly window (per third-party summary of OpenAI help center). Limits reset: 5-hour + weekly windows (Pro tiers: reported no 5-hour limit as of Oct 2026 — secondary source). When you hit the limit: Plus/Pro can buy credits or use an API key (secondary source).
- How usage is metered
- Codex shares the plan allowance. Five-hour window plus weekly window (per third-party summary of OpenAI help center).
- When limits reset
- 5-hour + weekly windows (Pro tiers: reported no 5-hour limit as of Oct 2026 — secondary source)
- When you hit the limit
- Plus/Pro can buy credits or use an API key (secondary source).
- Source
- https://chatgpt.com/pricing (checked 2026-10-14)
Limits by plan
| Plan | Per month | Notes |
|---|---|---|
| Free | $0 | Limited Codex access (official). |
| Go | $8* | Limited Codex (official). Price from secondary source. |
| Plus | $20* | Expanded Codex usage (official). Price from secondary source. |
| Pro (3 tiers) | $100* | Official: 'Your choice of 3 usage tiers'. $100/$200/$500 from secondary source. |
Questions
- When does the OpenAI Codex limit reset?
- 5-hour + weekly windows (Pro tiers: reported no 5-hour limit as of Oct 2026 — secondary source)
- How is OpenAI Codex usage counted?
- Codex shares the plan allowance. Five-hour window plus weekly window (per third-party summary of OpenAI help center).
- Can I keep using OpenAI Codex after hitting the limit?
- Plus/Pro can buy credits or use an API key (secondary source).