Claude Sonnet 4.5 vs Sonar Reasoning Pro
Anthropic vs Perplexity — benchmarks, pricing, and capabilities side by side.
- •Sonar Reasoning Pro has the higher intelligence index (95.7 vs 80.4)
- •Sonar Reasoning Pro is cheaper ($2.00 vs $3.00 per 1M input)
- •Claude Sonnet 4.5 has a larger context window (1M)
| Claude Sonnet 4.5 | Sonar Reasoning Pro | |
|---|---|---|
| Intelligence index | 80.4 | 95.7 |
| Developer | Anthropic | Perplexity |
| Type | LLM | Multimodal |
| Access | API only | API only |
| Context window | 1,000,000 tokens | 128,000 tokens |
| Input price | $3.00 / 1M | $2.00 / 1M |
| Output price | $15.00 / 1M | $8.00 / 1M |
| Speed | 42 tok/s | — |
| Released | September 29, 2025 | March 7, 2025 |
| Parameters | — | — |
| Input modalities | Text, Image | Text, Image |
| Output modalities | Text | Text |