GPT-4.1 Nano vs Kimi K2.5
OpenAI vs Moonshot AI — benchmarks, pricing, and capabilities side by side.
- •Kimi K2.5 has the higher intelligence index (87.9 vs 42.1)
- •GPT-4.1 Nano is cheaper ($0.10 vs $0.40 per 1M input)
- •GPT-4.1 Nano is faster
- •GPT-4.1 Nano has a larger context window (1M)
| GPT-4.1 Nano | Kimi K2.5 | |
|---|---|---|
| Intelligence index | 42.1 | 87.9 |
| Developer | OpenAI | Moonshot AI |
| Type | Multimodal | Multimodal |
| Access | API only | Open weights |
| Context window | 1,047,576 tokens | 262,144 tokens |
| Input price | $0.10 / 1M | $0.40 / 1M |
| Output price | $0.40 / 1M | $1.90 / 1M |
| Speed | 200 tok/s | 35 tok/s |
| Released | April 14, 2025 | January 27, 2026 |
| Parameters | — | 1T (32B active) |
| Input modalities | Image, Text | Text, Image |
| Output modalities | Text | Text |
Shared benchmarks
GPT-4.1 Nano
Kimi K2.5
GPQA Diamond
50.3
87.9
Humanity’s Last Exam
3.9
29.4