Updated March 25, 2026· Based on independent benchmark data
Google: Gemini 3.1 Pro Preview Custom Tools leads in intelligence with a score of 57.2 vs 48.4.
| Metric | Google: Gemini 3 Pro Preview | Google: Gemini 3.1 Pro Preview Custom Tools |
|---|---|---|
| Intelligence Score | 48.4 | 57.2 |
| Coding Score | 46.5 | 55.5 |
| Math Score | 95.7 | N/A |
| Speed (tok/s) | 116 tok/s | 113 tok/s |
| Latency (TTFT) | 25.53s | 23.00s |
| Input Price / 1M tokens | $2.00 | $2.00 |
| Output Price / 1M tokens | $12 | $12 |
| Context Window |
Google: Gemini 3.1 Pro Preview Custom Tools outperforms Google: Gemini 3 Pro Preview on the intelligence index with a score of 57.2 compared to 48.4. For coding tasks, Google: Gemini 3.1 Pro Preview Custom Tools has the edge with a coding score of 55.5 vs 46.5.
Both models deliver similar output speeds: Google: Gemini 3 Pro Preview at 116 tok/s and Google: Gemini 3.1 Pro Preview Custom Tools at 113 tok/s. Time to first token is 23.00s for Google: Gemini 3.1 Pro Preview Custom Tools vs 25.53s for Google: Gemini 3 Pro Preview, which affects perceived responsiveness in interactive applications.
Google: Gemini 3.1 Pro Preview Custom Tools is more affordable at $2.00/1M input tokens ($12/1M output), while Google: Gemini 3 Pro Preview costs $2.00/1M input ($12/1M output). For a typical workload of 100 requests per day at 2,000 tokens each, Google: Gemini 3 Pro Preview would cost approximately $12.00/month vs $12.00/month for Google: Gemini 3.1 Pro Preview Custom Tools in input costs alone.
Both models support the same context window of 1.0M tokens (approximately 524 pages of text).
Choose Google: Gemini 3.1 Pro Preview Custom Tools when you need higher intelligence (57.2), stronger coding performance (55.5).
Google: Gemini 3.1 Pro Preview Custom Tools scores higher on coding benchmarks (55.5 vs 46.5), making it the better choice for programming tasks.
Google: Gemini 3.1 Pro Preview Custom Tools is cheaper at $2.00/1M input tokens vs $2.00/1M for Google: Gemini 3 Pro Preview.
Google: Gemini 3 Pro Preview is faster, producing output at 116 tok/s compared to Google: Gemini 3.1 Pro Preview Custom Tools's 113 tok/s.
Yes, Google: Gemini 3 Pro Preview supports image input. Google: Gemini 3.1 Pro Preview Custom Tools also supports images.
Data last synced: March 25, 2026
| 1.0M |
| 1.0M |
| Max Output Tokens | 66K | 66K |
| Input Modalities | Text + Image + File + Audio + Video | Text + Audio + Image + Video + File |
| Output Modalities | Text | Text |
| Free Tier | No | No |
Both models have the same context window of 1.0M tokens.
It depends on your priorities. Google: Gemini 3.1 Pro Preview Custom Tools scores higher on intelligence (57.2), but Google: Gemini 3 Pro Preview may be better for specific use cases like budget-conscious projects or speed-critical applications.