Updated March 26, 2026· Based on independent benchmark data
Gemini 3.1 Pro Preview leads in intelligence with a score of 57.2 vs 24.6. For speed, Gemini 3.1 Pro Preview wins at 113 tok/s vs 0 tok/s.
| Metric | Sonar Reasoning Pro | Gemini 3.1 Pro Preview |
|---|---|---|
| Intelligence Score | 24.6 | 57.2 |
| Coding Score | N/A | 55.5 |
| Math Score | N/A | N/A |
| Speed (tok/s) | 0 tok/s | 113 tok/s |
| Latency (TTFT) | 0.00s | 23.84s |
| Input Price / 1M tokens | Free | $2.00 |
| Output Price / 1M tokens | Free | $12 |
| Context Window | 128K | 1.0M |
| Max Output Tokens | N/A | N/A |
| Input Modalities | Text + Image | Audio + File + Image + Text + Video |
Gemini 3.1 Pro Preview outperforms Sonar Reasoning Pro on the intelligence index with a score of 57.2 compared to 24.6.
Gemini 3.1 Pro Preview generates output significantly faster at 113 tok/s compared to Sonar Reasoning Pro's 0 tok/s, making it Infinityx faster for streaming responses. Time to first token is 0.00s for Sonar Reasoning Pro vs 23.84s for Gemini 3.1 Pro Preview, which affects perceived responsiveness in interactive applications.
Sonar Reasoning Pro is completely free, while Gemini 3.1 Pro Preview costs $2.00/1M input tokens and $12/1M output tokens.
Gemini 3.1 Pro Preview offers a larger context window at 1.0M tokens compared to Sonar Reasoning Pro's 128K. This means Gemini 3.1 Pro Preview can process roughly 524 pages of text in a single request vs 64 pages for Sonar Reasoning Pro.
Choose Gemini 3.1 Pro Preview when you need higher intelligence (57.2), faster output (113 tok/s), larger context window (1.0M).
Gemini 3.1 Pro Preview is faster, producing output at 113 tok/s compared to Sonar Reasoning Pro's 0 tok/s.
Yes, Sonar Reasoning Pro supports image input. Gemini 3.1 Pro Preview also supports images.
Gemini 3.1 Pro Preview has a larger context window at 1.0M compared to Sonar Reasoning Pro's 128K.
It depends on your priorities. Gemini 3.1 Pro Preview scores higher on intelligence (57.2), but Sonar Reasoning Pro may be better for specific use cases like cost savings or speed-critical applications.
Data last synced: March 26, 2026
| Output Modalities | Text | Text |
| Free Tier | Yes | No |