Grok-4 Heavy vs Mistral Medium 3.5
xAI vs Mistral AI — benchmarks, pricing, and capabilities side by side.
- •Grok-4 Heavy has the higher intelligence index (89.3 vs 74.8)
| Grok-4 Heavy | Mistral Medium 3.5 | |
|---|---|---|
| Intelligence index | 89.3 | 74.8 |
| Developer | xAI | Mistral AI |
| Type | Multimodal | Multimodal |
| Access | API only | API only |
| Context window | — | 262,144 tokens |
| Input price | — | $1.50 / 1M |
| Output price | — | $7.50 / 1M |
| Speed | — | 140 tok/s |
| Released | July 9, 2025 | April 30, 2026 |
| Parameters | — | — |
| Input modalities | — | Text, Image |
| Output modalities | — | Text |
Shared benchmarks
Grok-4 Heavy
Mistral Medium 3.5
GPQA Diamond
88.4
74.8
Humanity’s Last Exam
50.7
12.8