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OpenAI Codex usage limits by plan
Codex and ChatGPT Work share one allowance. OpenAI publishes estimated local messages per 5-hour window for Plus (not fixed limits); weekly limits may also apply.
When you hit the limit: Plus and Pro can buy additional ChatGPT credits; any user can run local chats with an API key at API rates.
| Plan | Price | Official description |
|---|---|---|
| Free | $0/mo | GPT-6 Luna at Standard speed in the desktop app, subject to rollout. |
| Go | $8/mo | For lightweight coding tasks. GPT-6 Luna at Standard speed in the desktop app, subject to rollout. |
| Plus | $20/mo | Official estimate of local messages per 5 hours: GPT-6.1 Sol 15–160, GPT-6.1 Terra 35–285, GPT-6 Sol 15–150, GPT-6 Astra 5–45, GPT-6 Luna 350–3,000. Weekly limits may also apply. Fast mode draws 2.5x included usage. |
| Pro ($100 / $200 / $500) | $100, $200 or $500/mo | Pro plans currently have no five-hour limit (per OpenAI). Ultrafast mode only on Pro $500. Per-tier weekly allowances are not stated on the pricing page. |
Source: developers.openai.com/codex/pricing, checked 2026-10-29.
Real usage reports (all plans)
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Changes
- 2026-11-21 · Scheduled: OpenAI states GPT-5.6 Sol promotional credit pricing is available 'at least through November 21, 2026'. Watch for a rate change after this date.
- 2026-10-29 · Baseline: LimitWatch baseline snapshot of official pricing pages for Claude Code, Codex, Cursor and GitHub Copilot. Future changes will be diffed against this snapshot.
- 2026-10-14 · Model retired: GPT-5.5 retired from Codex with ChatGPT sign-in at 12:00 PDT. API-key sessions not affected.
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