Grok-4 Heavy vs R1 1776
xAI vs Perplexity — benchmarks, pricing, and capabilities side by side.
- •R1 1776 has the higher intelligence index (95.4 vs 89.3)
| Grok-4 Heavy | R1 1776 | |
|---|---|---|
| Intelligence index | 89.3 | 95.4 |
| Developer | xAI | Perplexity |
| Type | Multimodal | LLM |
| Access | API only | — |
| Context window | — | — |
| Input price | — | $0.00 / 1M |
| Output price | — | $0.00 / 1M |
| Speed | — | — |
| Released | July 9, 2025 | February 18, 2025 |
| Parameters | — | — |
| Input modalities | — | — |
| Output modalities | — | — |