Grok-1.5V vs Grok-4 Heavy
xAI vs xAI — benchmarks, pricing, and capabilities side by side.
- •Grok-4 Heavy has the higher intelligence index (89.3 vs 71.3)
| Grok-1.5V | Grok-4 Heavy | |
|---|---|---|
| Intelligence index | 71.3 | 89.3 |
| Developer | xAI | xAI |
| Type | Multimodal | Multimodal |
| Access | API only | API only |
| Context window | — | — |
| Input price | — | — |
| Output price | — | — |
| Speed | — | — |
| Released | April 12, 2024 | July 9, 2025 |
| Parameters | — | — |
| Input modalities | — | — |
| Output modalities | — | — |