Grok-2 vs Sonar Reasoning Pro
xAI vs Perplexity — benchmarks, pricing, and capabilities side by side.
- •Sonar Reasoning Pro has the higher intelligence index (95.7 vs 62.4)
| Grok-2 | Sonar Reasoning Pro | |
|---|---|---|
| Intelligence index | 62.4 | 95.7 |
| Developer | xAI | Perplexity |
| Type | Multimodal | Multimodal |
| Access | API only | API only |
| Context window | 128,000 tokens | 128,000 tokens |
| Input price | $2.00 / 1M | $2.00 / 1M |
| Output price | $10.00 / 1M | $8.00 / 1M |
| Speed | 85 tok/s | — |
| Released | August 13, 2024 | March 7, 2025 |
| Parameters | — | — |
| Input modalities | Text, Image | Text, Image |
| Output modalities | Text | Text |
Shared benchmarks
Grok-2
Sonar Reasoning Pro
MATH-500
77.8
95.7