Updated March 26, 2026· Based on independent benchmark data
Gemini 3.1 Pro Preview leads in intelligence with a score of 57.2 vs 34.6. Gemini 2.5 Pro is 1.6x cheaper at $1.25/1M tokens vs $2.00/1M.
| Metric | Gemini 2.5 Pro | Gemini 3.1 Pro Preview |
|---|---|---|
| Intelligence Score | 34.6 | 57.2 |
| Coding Score | 31.9 | 55.5 |
| Math Score | 87.7 | N/A |
| Speed (tok/s) | 124 tok/s | 113 tok/s |
| Latency (TTFT) | 23.95s | 23.84s |
| Input Price / 1M tokens | $1.25 | $2.00 |
| Output Price / 1M tokens | $10 | $12 |
| Context Window | 1.0M |
Gemini 3.1 Pro Preview outperforms Gemini 2.5 Pro on the intelligence index with a score of 57.2 compared to 34.6. For coding tasks, Gemini 3.1 Pro Preview has the edge with a coding score of 55.5 vs 31.9.
Both models deliver similar output speeds: Gemini 2.5 Pro at 124 tok/s and Gemini 3.1 Pro Preview at 113 tok/s. Time to first token is 23.84s for Gemini 3.1 Pro Preview vs 23.95s for Gemini 2.5 Pro, which affects perceived responsiveness in interactive applications.
Gemini 2.5 Pro is more affordable at $1.25/1M input tokens ($10/1M output), while Gemini 3.1 Pro Preview costs $2.00/1M input ($12/1M output). For a typical workload of 100 requests per day at 2,000 tokens each, Gemini 2.5 Pro would cost approximately $7.50/month vs $12.00/month for Gemini 3.1 Pro Preview in input costs alone.
Both models support the same context window of 1.0M tokens (approximately 524 pages of text).
Choose Gemini 2.5 Pro when you need lower cost. Choose Gemini 3.1 Pro Preview when you need higher intelligence (57.2), stronger coding performance (55.5).
Gemini 3.1 Pro Preview scores higher on coding benchmarks (55.5 vs 31.9), making it the better choice for programming tasks.
Gemini 2.5 Pro is cheaper at $1.25/1M input tokens vs $2.00/1M for Gemini 3.1 Pro Preview.
Gemini 2.5 Pro is faster, producing output at 124 tok/s compared to Gemini 3.1 Pro Preview's 113 tok/s.
Yes, Gemini 2.5 Pro supports image input. Gemini 3.1 Pro Preview also supports images.
Data last synced: March 26, 2026
| 1.0M |
| Max Output Tokens | N/A | N/A |
| Input Modalities | Text + Image + File + Audio + Video | Audio + File + Image + Text + Video |
| Output Modalities | Text | Text |
| Free Tier | No | No |
Both models have the same context window of 1.0M tokens.
It depends on your priorities. Gemini 3.1 Pro Preview scores higher on intelligence (57.2), but Gemini 2.5 Pro may be better for specific use cases like budget-conscious projects or speed-critical applications.