ChatGPT Codex limits in 2026 are estimate ranges, not one fixed message cap. If you need your exact remaining allowance right now, check Codex Settings > Usage, or run /status inside an active Codex CLI session. This page summarizes the official planning ranges by plan.
The practical version: Plus is for light use, Pro $100 gives 5x more usage, Pro $200 gives 20x more usage, and Business or Enterprise is mainly a workspace decision. If you hit a limit, your next step is usually to wait for reset, buy credits if eligible, or upgrade only if limits repeatedly block real work.
Quick answer
- OpenAI publishes Codex estimates per rolling five-hour window.
- Plus GPT-5.5 local messages are estimated at 15-80 per 5 hours.
- Pro $100 is 5x usage. Pro $200 is 20x usage.
- Cloud tasks, code reviews, weekly caps, and credits can change the practical limit.
| Plan | Local messages / 5h | Cloud tasks / 5h | Code reviews / 5h | If you hit the limit |
|---|---|---|---|---|
| Plus | 15-80 GPT-5.5, 20-100 GPT-5.4, 60-350 GPT-5.4-mini | 10-60 | 20-50 | Wait for reset, buy credits if eligible, or upgrade. |
| Pro 5x | 80-400 GPT-5.5, 100-500 GPT-5.4, 300-1750 GPT-5.4-mini | 50-300 | 100-250 | Use credits if eligible, or move to 20x only if you need more headroom. |
| Pro 20x | 300-1600 GPT-5.5, 400-2000 GPT-5.4, 1200-7000 GPT-5.4-mini | 200-1200 | 400-1000 | Use for heavy daily Codex work across larger projects. |
| Business standard | Same estimate range as Plus | 10-60 | 20-50 | Use workspace credits and admin controls where available. |
Official ChatGPT Codex limit estimates
OpenAI's Codex pricing page lists these local-message estimates per five-hour window. Checked June 2, 2026.
| Plan | GPT-5.5 | GPT-5.4 | GPT-5.4-mini |
|---|---|---|---|
| Plus | 15-80 / 5h | 20-100 / 5h | 60-350 / 5h |
| Pro 5x | 80-400 / 5h | 100-500 / 5h | 300-1750 / 5h |
| Pro 20x | 300-1600 / 5h | 400-2000 / 5h | 1200-7000 / 5h |
| Business standard | 15-80 / 5h | 20-100 / 5h | 60-350 / 5h |
The same official table also lists cloud-task and code-review estimates.
| Plan | Cloud tasks | Code reviews |
|---|---|---|
| Plus / Business standard | 10-60 / 5h | 20-50 / 5h |
| Pro 5x | 50-300 / 5h | 100-250 / 5h |
| Pro 20x | 200-1200 / 5h | 400-1000 / 5h |
Treat these as planning estimates. Large repos, long prompts, tool use, and long outputs can lower the real number you experience.
Which ChatGPT plan should you choose for Codex?
| Plan | Choose it when |
|---|---|
| Free / Go | You only want to test Codex. |
| Plus | You use Codex for small fixes, scripts, and occasional coding help. |
| Pro $100 | Plus limits interrupt real work a few times a week. |
| Pro $200 | You use Codex heavily every day or across multiple projects. |
| Business / Enterprise | You need team billing, admin controls, SSO, compliance, or workspace credits. |
| API key | You need automation, CI, or scripted local jobs. |
For broader plan differences, see our ChatGPT Plus vs Pro vs Business guide.
What counts against Codex limits?
Codex counts toward agentic usage. The exact drain depends on the work, not just the number of prompts.
- Model: larger models usually consume more allowance or credits.
- Context: large repos, long chats, and big AGENTS.md files cost more.
- Surface: local messages, cloud tasks, code review, and automation can count differently.
- Output: long edits, long explanations, and multi-file changes use more.
What happens when you hit the Codex limit?
| Plan | Next step |
|---|---|
| Free / Go | Upgrade to Plus. |
| Plus / Pro | Buy credits if eligible, wait for reset, or upgrade. |
| Business / Edu / Enterprise | Use workspace credits and admin controls. |
| API key | Usage is billed separately at API rates. |
How do Codex credits work in 2026?
Credits are token-based. Bigger context, more tools, and longer output usually mean higher credit usage.
| Model | Input | Cached input | Output |
|---|---|---|---|
| GPT-5.5 | 125 credits / 1M | 12.50 credits / 1M | 750 credits / 1M |
| GPT-5.4 | 62.50 credits / 1M | 6.25 credits / 1M | 375 credits / 1M |
| GPT-5.4-mini | 18.75 credits / 1M | 1.875 credits / 1M | 113 credits / 1M |
OpenAI also notes that a typical GPT-5.5 Codex task may use roughly 5-45 credits, but workload can change that quickly.
How to make Codex limits last longer
- Narrow the task: ask for one clear change at a time.
- Trim context: remove old logs, repeated instructions, and irrelevant files.
- Keep AGENTS.md focused: long instructions are injected often.
- Disable unused MCP servers: extra tools add overhead.
- Use smaller models when suitable: only if they are available in your Codex picker.
- Watch usage: check Codex Settings > Usage or /status in the CLI.
Bottom line
Use Plus if Codex limits rarely block you. Move to Pro $100 if Plus interrupts weekly work. Use Pro $200 for heavy daily Codex usage. Choose Business or Enterprise for team controls, and API billing for automation.
Frequently Asked Questions
Does ChatGPT Plus include Codex?
Yes. OpenAI says Codex is included across Free, Go, Plus, Pro, Business, Edu, and Enterprise plans. Plus is the practical starting point for regular personal use.
What is the ChatGPT Plus Codex limit?
OpenAI gives estimate ranges, not one fixed cap. For Plus, the public Codex table lists GPT-5.5 local messages at about 15-80 per 5 hours, GPT-5.4 at 20-100, and GPT-5.4-mini at 60-350.
What is the difference between Pro $100 and Pro $200 for Codex?
Pro $100 is positioned as 5x higher usage than Plus. Pro $200 is positioned as 20x higher usage than Plus.
Can I buy more Codex usage after I hit the limit?
Eligible Plus and Pro users can buy ChatGPT credits. Business, Edu, and Enterprise workspaces may use workspace credits, depending on their pricing setup.
Do API key Codex tasks use my ChatGPT Codex limit?
No. API key usage is billed separately at API rates and is better for CI, automation, and scripted workflows.
Where can I see my remaining Codex usage?
Use Codex Settings > Usage. In an active Codex CLI session, OpenAI also says you can use /status.
What if the docs mention a model that is not in my Codex picker?
Use your Codex picker and usage dashboard as the practical source of truth. Docs tables can lag behind account-level model availability.
Sources
Sources checked on June 2, 2026. The five-hour ranges come from OpenAI's own Codex pricing table.
- OpenAI Developers Codex pricing page: https://developers.openai.com/codex/pricing
- Using Codex with your ChatGPT plan: https://help.openai.com/en/articles/11369540-using-codex-with-your-chatgpt-plan
- About ChatGPT Pro tiers: https://help.openai.com/en/articles/9793128-about-chatgpt-pro-tiers
- Using Credits for Flexible Usage in ChatGPT: https://help.openai.com/en/articles/12642688-using-credits-for-flexible-usage-in-chatgpt-freegopluspro
- Codex rate card: https://help.openai.com/en/articles/20001106-codex-rate-card
- ChatGPT release notes: https://help.openai.com/en/articles/6825453-chatgpt-release-notes
- Model release notes: https://help.openai.com/en/articles/9624314-model-release-notes