Side-by-side comparison of pricing, 12 benchmarks, and generation speed.
| Metric | GPT-5.1 Codex mini (high) | Devstral Medium |
|---|---|---|
| Input ($/M tokens) | $0.25 | $0.4 |
| Output ($/M tokens) | $2 | $2 |
Data from Artificial Analysis API — 12 benchmarks
GPT-5.1 Codex mini (high) is cheaper overall. Its blended price (3:1 input/output ratio) is $0.69/M tokens vs $0.80/M for Devstral Medium.
GPT-5.1 Codex mini (high) wins 11 out of 12 benchmarks compared to 1 for Devstral Medium. See the detailed benchmark chart above for per-category results.
GPT-5.1 Codex mini (high) generates tokens faster at 176 tok/s vs 78 tok/s. However, Devstral Medium has lower time-to-first-token (0.52s vs 4.17s).
Choose based on your priorities: GPT-5.1 Codex mini (high) for lower cost, GPT-5.1 Codex mini (high) for stronger benchmark performance, and GPT-5.1 Codex mini (high) for faster generation. For latency-sensitive apps, check the TTFT comparison above.