Grok-4 Heavy vs Qwen3.5 397B A17B
xAI vs Alibaba — benchmarks, pricing, and capabilities side by side.
| Grok-4 Heavy | Qwen3.5 397B A17B | |
|---|---|---|
| Intelligence index | 89.3 | 89.3 |
| Developer | xAI | Alibaba |
| Type | Multimodal | Multimodal |
| Access | API only | Open weights |
| Context window | — | 262,144 tokens |
| Input price | — | $0.39 / 1M |
| Output price | — | $2.34 / 1M |
| Speed | — | 53 tok/s |
| Released | July 9, 2025 | February 16, 2026 |
| Parameters | — | — |
| Input modalities | — | Text, Image, Video |
| Output modalities | — | Text |
Shared benchmarks
Grok-4 Heavy
Qwen3.5 397B A17B
GPQA Diamond
88.4
89.3
Humanity’s Last Exam
50.7
27.3