Gemini 2.5 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 73.1)
- •Gemini 2.5 Flash is cheaper ($0.30 vs $2.00 per 1M input)
- •Gemini 2.5 Flash has a larger context window (1M)
| Gemini 2.5 Flash | Sonar Reasoning Pro | |
|---|---|---|
| Intelligence index | 73.1 | 95.7 |
| Developer | Perplexity | |
| Type | Multimodal | Multimodal |
| Access | API only | API only |
| Context window | 1,048,576 tokens | 128,000 tokens |
| Input price | $0.30 / 1M | $2.00 / 1M |
| Output price | $2.50 / 1M | $8.00 / 1M |
| Speed | 85 tok/s | — |
| Released | April 17, 2025 | March 7, 2025 |
| Parameters | — | — |
| Input modalities | Text, Image, Audio, Video | Text, Image |
| Output modalities | Text | Text |
Shared benchmarks
Gemini 2.5 Flash
Sonar Reasoning Pro
MATH-500
98.1
95.7