Gemini 3.5 Flash vs Sonar Reasoning Pro
Google vs Perplexity — benchmarks, pricing, and capabilities side by side.
- •Sonar Reasoning Pro has the higher intelligence index (95.7 vs 92.2)
- •Gemini 3.5 Flash is cheaper ($1.50 vs $2.00 per 1M input)
- •Gemini 3.5 Flash has a larger context window (1M)
| Gemini 3.5 Flash | Sonar Reasoning Pro | |
|---|---|---|
| Intelligence index | 92.2 | 95.7 |
| Developer | Perplexity | |
| Type | Multimodal | Multimodal |
| Access | API only | API only |
| Context window | 1,048,576 tokens | 128,000 tokens |
| Input price | $1.50 / 1M | $2.00 / 1M |
| Output price | $9.00 / 1M | $8.00 / 1M |
| Speed | 221 tok/s | — |
| Released | May 19, 2026 | March 7, 2025 |
| Parameters | — | — |
| Input modalities | Text, Image, Audio, Video | Text, Image |
| Output modalities | Text | Text |