Cheapest way to use OpenAI Codex
Short answerStart on the free tier. The cheapest paid OpenAI Codex plan is Go at $8/month (secondary source). Limits reset: 5-hour + weekly windows (Pro tiers: reported no 5-hour limit as of Oct 2026 — secondary source).
- Free tier. Limited Codex access (official).
- Go — $8/month*. Limited Codex (official). Price from secondary source.
- Time your work to the reset. 5-hour + weekly windows (Pro tiers: reported no 5-hour limit as of Oct 2026 — secondary source).
- Know the overage rule. Plus/Pro can buy credits or use an API key (secondary source).
All OpenAI Codex plans
| 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
- What is the cheapest OpenAI Codex plan?
- Go at $8/month.
- Is there a free way to use OpenAI Codex?
- Yes: Limited Codex access (official).
- Is annual billing cheaper for OpenAI Codex?
- No annual discount was verified.