OpenAI Codex pricing & plans
OpenAI Codex offers 6 fixed-price plans we track. Each is scored by Value× — the API-equivalent compute it unlocks per dollar — so you can see which OpenAI Codex plan stretches your budget furthest.
Key facts
- OpenAI Codex's paid plans run from Go at $8/mo to Pro (20x) at $200/mo (as of August 28, 2026).
- Best value: Plus at $20/mo unlocks an estimated $110/mo of API-equivalent usage — a Value× of 5.5×.
- OpenAI Codex has a free plan (Free — Explore Codex on quick tasks).
- OpenAI Codex plans include access to GPT-5.5, GPT-5.4, GPT-5.4 mini.
| Plan | Price/mo | Est. value/mo | Value× | |
|---|---|---|---|---|
| Plus | $20 | $110 | 5.5× | See plan → |
| Pro (20x) | $200 | $1.1k | 5.5× | See plan → |
| Pro (5x) | $100 | $520 | 5.2× | See plan → |
| Go | $8 | $40 | 5.0× | See plan → |
| Business | $25 | $110 | 4.4× | See plan → |
| Free | Free | $0 | — | See plan → |
About OpenAI Codex pricing
Codex (OpenAI's coding agent) is included in every ChatGPT subscription tier. On 2026-04-02 OpenAI moved Codex usage from per-message limits to a token-aligned credit model (surfaced as approximate local messages per 5-hour window, plus weekly limits). Pro is sold as 'from $100/month' offering a choice of 5x ($100) or 20x ($200) Plus rate limits. Models across paid tiers: GPT-5.6 (Sol/Terra/Luna), GPT-5.5, GPT-5.4, GPT-5.4 mini; Pro adds GPT-5.3-Codex-Spark (research preview, separate limit). GPT-5.5 is the newest flagship and uses significantly fewer tokens than GPT-5.4 for comparable results, supporting generous limits. Credit rate card (credits per 1M tokens): GPT-5.5 125 in / 12.5 cached / 750 out; GPT-5.4 62.5 / 6.25 / 375; GPT-5.4-Mini 18.75 / 1.875 / 113; GPT-5.3-Codex 43.75 / 4.375 / 350. A typical GPT-5.5 Codex task uses ~5-45 credits; OpenAI cites ~$100-200/developer/month typical Codex spend. ChatGPT Business now offers two seat types: standard ChatGPT seats ($25/mo monthly, $20/mo annual, 2-seat min) and usage-based Codex-only seats (no minimum, requires workspace credits). developers.openai.com/codex/pricing and chatgpt.com/codex/pricing re-verified 2026-08-05.
Frequently asked questions
How much does OpenAI Codex cost per month?
As of August 28, 2026, OpenAI Codex's cheapest paid plan is Go at $8/mo, with 5 more plans above it.
What is the best-value OpenAI Codex plan?
Plus at $20/mo delivers the most value per dollar: an estimated $110/mo of API-equivalent usage, a Value× of 5.5× (as of August 28, 2026).
Does OpenAI Codex have a free plan?
Yes — OpenAI Codex's Free plan is free, though usage is limited compared to paid plans (as of August 28, 2026).
Which models are included in OpenAI Codex plans?
OpenAI Codex plans include access to GPT-5.5, GPT-5.4, GPT-5.4 mini, GPT-5.6 Sol, among others (as of August 28, 2026).
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