Is OpenAI Codex free?
Codex is included in every ChatGPT plan, including Free and Go, which get GPT-6 Luna in the desktop app as it rolls out. Serious use starts with Plus at $20/month, which adds GPT-6.1 Sol.
Coding Agent Guide
Codex comes with every ChatGPT plan. On Plus ($20/month) OpenAI estimates 15–160 local messages per 5-hour window on GPT-6.1 Sol and 5–45 on GPT-6 Astra, with weekly limits on top. The Pro tiers ($100, $200 or $500 a month) have no 5-hour limit, and the $500 tier adds Ultrafast mode. Past your limit, Plus and Pro users can buy credits.
Models: OpenAI models only — GPT-6.1 Sol and GPT-6 Luna on Plus, plus GPT-6 Astra; GPT-5.5 leaves Codex on October 14, 2026.
Official rows come from OpenAI's own pricing page; reported rows from press or trackers we could not confirm there.
| Plan | Price | What you get |
|---|---|---|
| Freeofficial | $0GPT-6 Luna at standard speed in the desktop app, subject to rollout. No published limits. | GPT-6 Luna at standard speed in the desktop app, subject to rollout. No published limits. |
| Goofficial | $8/moSame GPT-6 Luna access as Free. No published limits. | Same GPT-6 Luna access as Free. No published limits. |
| Plusofficial | $20/moGPT-6.1 Sol and GPT-6 Luna. Per 5 hours: GPT-6 Astra 5–45, GPT-6.1 Sol 15–160, GPT-6 Sol 15–150, GPT-6 Luna 350–3,000 local messages; weekly limits may apply. | GPT-6.1 Sol and GPT-6 Luna. Per 5 hours: GPT-6 Astra 5–45, GPT-6.1 Sol 15–160, GPT-6 Sol 15–150, GPT-6 Luna 350–3,000 local messages; weekly limits may apply. |
| Proofficial | $100, $200 or $500/moNo five-hour limit; higher tiers get more included usage. Ultrafast mode on the $500 tier. | No five-hour limit; higher tiers get more included usage. Ultrafast mode on the $500 tier. |
| Businessofficial | $25/user/mo ($20 billed annually)2+ users. Roughly Plus-level limits per seat; workspace credits for extra usage. | 2+ users. Roughly Plus-level limits per seat; workspace credits for extra usage. |
| Enterprise / Eduofficial | Contact salesFlexible-pricing workspaces have no fixed rate limits. | Flexible-pricing workspaces have no fixed rate limits. |
| API keyofficial | Pay per tokenGPT-6.1 Sol $2/$10, GPT-6 Luna $0.10/$0.50, GPT-6 Astra $10/$50 per million tokens. | GPT-6.1 Sol $2/$10, GPT-6 Luna $0.10/$0.50, GPT-6 Astra $10/$50 per million tokens. |
October 14, 2026 official
GPT-5.5 retires from ChatGPT, ChatGPT Work and Codex on all plans (the API is not affected).
September 29, 2026 official
GPT-6.1 Sol launches at DevDay for paid plans through ChatGPT Work and Codex.
September 22, 2026 official
GPT-6 Sol and GPT-6 Luna launch.
September 3, 2026 official
GPT-6 Astra launches and becomes available in Codex.
Codex is included in every ChatGPT plan, including Free and Go, which get GPT-6 Luna in the desktop app as it rolls out. Serious use starts with Plus at $20/month, which adds GPT-6.1 Sol.
OpenAI estimates 15–160 local messages per 5-hour window on GPT-6.1 Sol, 15–150 on GPT-6 Sol, 5–45 on GPT-6 Astra and 350–3,000 on GPT-6 Luna, with weekly limits on top. The range is wide because bigger tasks use more.
Pro starts at $100/month, with tiers at $100, $200 and $500. All have no 5-hour limit; the $500 tier adds Ultrafast mode.
Yes. Usage then bills per token at API rates — GPT-6.1 Sol is $2 per million input tokens and $10 per million output.
Coding-agent pricing changed for almost every vendor in 2026, often without notice. Everything above was checked against the linked sources on October 13, 2026; if you spot something outdated, email hello@userightai.com.
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