Codex model pricing in AI credits
Every current-generation Codex model, ranked by the credits a typical daily-coding request burns. Verified 2026-07-21.
| Model | Category | Credits / 1M in | Credits / 1M out | Credits / request |
|---|---|---|---|---|
| GPT-5.4 mini | Lightweight | 18.75 | 113 | 0.3 |
| GPT-5.6 Luna | Lightweight | 25.00 | 150 | 0.4 |
| GPT-5.6 Terra | Versatile | 62.50 | 375 | 1.0 |
| GPT-5.6 Sol | Powerful | 125 | 750 | 1.9 |
Daily-coding request: a defined workload basket, not a measured task, priced against OpenAI's published credit rate card. See each model's page for the worked cost and the direct-API comparison.