Codex credits vs the OpenAI API price
They are the same. A Codex credit is metered at $0.04, and the Codex credit rate card equals the OpenAI API dollar rate card multiplied by 25 for every model, so a workload that costs 1 credits ($0.04) in Codex costs $0.04 on the API. There is no per-model markup; credits are OpenAI API pricing in a different unit. Verified 2026-07-21.
| Codex credits | OpenAI API | |
|---|---|---|
| Unit | 1 credit = $0.04 | $ per token |
| GPT-5.6 Terra input / 1M | 62.5 credits ($2.50) | $2.50 |
| GPT-5.6 Terra output / 1M | 375 credits ($15.00) | $15.00 |
| Per-model markup | 0% | 0% |