Grok 4 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 78.2)
- •Sonar Reasoning Pro is cheaper ($2.00 vs $3.00 per 1M input)
- •Grok 4 has a larger context window (256K)
| Grok 4 | Sonar Reasoning Pro | |
|---|---|---|
| Intelligence index | 78.2 | 95.7 |
| Developer | xAI | Perplexity |
| Type | LLM | Multimodal |
| Access | API only | API only |
| Context window | 256,000 tokens | 128,000 tokens |
| Input price | $3.00 / 1M | $2.00 / 1M |
| Output price | $15.00 / 1M | $8.00 / 1M |
| Speed | 100 tok/s | — |
| Released | July 9, 2025 | March 7, 2025 |
| Parameters | — | — |
| Input modalities | Text, Image | Text, Image |
| Output modalities | Text | Text |
Shared benchmarks
Grok 4
Sonar Reasoning Pro
MATH-500
99
95.7