GPT-5 Mini vs GPT-5.1-Codex-Mini
Both have similar output pricing. Choose GPT-5 Mini or GPT-5.1-Codex-Mini based on the trade-off between cost, context, and the benchmarks that matter for your use case.
| Spec | GPT-5 Mini | GPT-5.1-Codex-Mini |
|---|---|---|
| Provider | OpenAI | OpenAI |
| Input / 1M tokens | $0.25 | $0.25 |
| Output / 1M tokens | $2.00 | $2.00 |
| Context window | 400K | 400K |
| Parameters | — | — |
| Open weights | No | No |
| Released | Aug 2025 | Nov 2025 |
| LiveBench score | 66.6 | 60.8 |
| SWE-bench Verified score | 59.8 | — |
| SWE-bench Multilingual score | 39.7 | — |
| LMArena (Chatbot Arena) Elo score | 1373 | — |
| LMArena Vision Elo score | 1202 | — |
| GPQA Diamond score | 75.0 | — |
| FrontierMath score | 27.2 | — |
| Epoch Capabilities Index score | 145 | — |
| LMArena WebDev Elo score | — | 1243 |
FAQ
Is GPT-5 Mini or GPT-5.1-Codex-Mini cheaper?
GPT-5 Mini and GPT-5.1-Codex-Mini have comparable output pricing.
Which has the larger context window, GPT-5 Mini or GPT-5.1-Codex-Mini?
Both models offer a similar context window.
Pricing is indicative — confirm with the provider before production use. Highlighted values indicate the better figure for that row.