GPT-5.1-Codex-Mini vs GPT-5 Mini
GPT-5.1-Codex-Mini is the cheaper option on input; GPT-5.1-Codex-Mini is cheaper on output. Figures below are per million tokens, from vendor pricing cited in our reporting.
| GPT-5.1-Codex-Mini | GPT-5 Mini | |
|---|---|---|
| Input per 1M tokens | $0.25 | $0.25 |
| Output per 1M tokens | $2 | $2 |
| Cached input per 1M | $0.03 | $0.03 |
| Context window | 400K tokens | 400K tokens |
| Parameters | — | — |
| Licence | ||
| Benchmark | — | — |
| Vendor | OpenAI | OpenAI |
| Released | — | — |
What the numbers say
- Input price gap: 0% ($0.25 vs $0.25).
- Blended three-to-one input/output rate: $2.75 for GPT-5.1-Codex-Mini, $2.75 for GPT-5 Mini.
- Context: 400K tokens against 400K tokens.
- Licence: GPT-5.1-Codex-Mini is ; GPT-5 Mini is .
Sources
GPT-5.1-Codex-Mini specs · GPT-5 Mini specs · Full price index