GPT-5.3-Codex vs MiMo-V2.5
OpenAI vs Xiaomi — benchmarks, pricing, and capabilities side by side.
- •GPT-5.3-Codex has the higher intelligence index (91.5 vs 84.9)
- •MiMo-V2.5 is cheaper ($0.40 vs $1.75 per 1M input)
- •MiMo-V2.5 is faster
- •MiMo-V2.5 has a larger context window (1M)
| GPT-5.3-Codex | MiMo-V2.5 | |
|---|---|---|
| Intelligence index | 91.5 | 84.9 |
| Developer | OpenAI | Xiaomi |
| Type | Multimodal | Multimodal |
| Access | API only | Open weights |
| Context window | 400,000 tokens | 1,048,576 tokens |
| Input price | $1.75 / 1M | $0.40 / 1M |
| Output price | $14.00 / 1M | $2.00 / 1M |
| Speed | 73 tok/s | 92 tok/s |
| Released | February 24, 2026 | April 22, 2026 |
| Parameters | — | — |
| Input modalities | Text, Image | Text, Audio, Image, Video |
| Output modalities | Text | Text |
Shared benchmarks
GPT-5.3-Codex
MiMo-V2.5
GPQA Diamond
91.5
84.9
Humanity’s Last Exam
39.9
25.2