Grok-4 Heavy vs Qwen3.5 Plus
xAI vs Alibaba — benchmarks, pricing, and capabilities side by side.
| Grok-4 Heavy | Qwen3.5 Plus | |
|---|---|---|
| Intelligence index | 89.3 | — |
| Developer | xAI | Alibaba |
| Type | Multimodal | Multimodal |
| Access | API only | API only |
| Context window | — | 1,000,000 tokens |
| Input price | — | $0.26 / 1M |
| Output price | — | $1.56 / 1M |
| Speed | — | — |
| Released | July 9, 2025 | February 16, 2026 |
| Parameters | — | — |
| Input modalities | — | Text, Image, Video |
| Output modalities | — | Text |