Automated page. Written and translated automatically by AI and checked against the sources by software; no human editor. SI-IQ is an index built from public benchmark results, not an IQ test. How it works
How smart is Gemini 3.1 Pro?
Gemini 3.1 Pro is a model from Google DeepMind, released on Feb 19, 2026. Its SI-IQ is 127 (90% interval 124–130), estimated from 9 benchmark results by 2 independent evaluators. Its strongest area is Knowledge and its weakest is Math.
Facts
- Developer
- Google DeepMind
- Released
- Feb 19, 2026
- Access
- API access
- Benchmarks used
- 9 results from 2 evaluators
- API price
- $2.00 input / $12 output per 1M tokens (developer's price list, Oct 18, 2026)
- Context window
- 1,048,576 tokens
Ability by area (SI-IQ, 90% interval)
Every benchmark result we used
Each score is one value exactly as the source published it: for Epoch AI the best of its run settings, for OpenRouter the median hosting provider (the developer's own hosting when it ran the test). “Implied SI-IQ” is the ability that this single result points to; the overall SI-IQ is their precision-weighted average.
| Benchmark | Score | Evaluated by | Source |
|---|---|---|---|
| Chess Puzzles | 51.0% | Epoch AI | Epoch AI Benchmarking Hub · data file |
| Furniture Assembly not in index | 26.7% | Epoch AI | Epoch AI Benchmarking Hub · data file |
| Mystery Game Puzzles | 34.0% | Epoch AI | Epoch AI Benchmarking Hub · data file |
| FrontierMath Tier 4 | 26.8% | Epoch AI | Epoch AI Benchmarking Hub · data file |
| FrontierMath Tiers 1–3 | 59.6% | Epoch AI | Epoch AI Benchmarking Hub · data file |
| OTIS Mock AIME 2024–2025 | 95.6% | Epoch AI | Epoch AI Benchmarking Hub · data file |
| SWE-bench Verified (Epoch AI run) | 75.6% | Epoch AI | Epoch AI Benchmarking Hub · data file |
| GPQA Diamond | 94.4% | Epoch AI | Epoch AI Benchmarking Hub · data file |
| GPQA Diamond (OpenRouter run) | 94.8% | OpenRouter | OpenRouter benchmark datasets · data file |
| SimpleQA Verified | 73.5% | Epoch AI | Epoch AI Benchmarking Hub · data file |
| τ²-bench Airline (OpenRouter run) | 74.2% | OpenRouter | OpenRouter benchmark datasets · data file |
Human preference (Arena)
On the Arena leaderboard, where people vote between two anonymous answers, Gemini 3.1 Pro has a rating of 1,487 (1,484–1,490) from 127,649 votes (published Oct 15, 2026). Human preference is a different measure from benchmark ability and is not part of SI-IQ. Arena (Hugging Face)
Models with similar SI-IQ
| Model | SI-IQ | |
|---|---|---|
| Claude Opus 4.7Anthropic | 127 | Gemini 3.1 Pro vs Claude Opus 4.7 |
| Kimi K3Moonshot | 127 | Gemini 3.1 Pro vs Kimi K3 |
| Muse Spark OpenMeta AI | 127 | Gemini 3.1 Pro vs Muse Spark Open |
| Gemini 3.5 FlashGoogle DeepMind | 126 | Gemini 3.1 Pro vs Gemini 3.5 Flash |
| Grok 4.6xAI | 126 | Gemini 3.1 Pro vs Grok 4.6 |
Computed with SI-IQ method version 1.0.0. Read the full methodology
Data sources: Arena leaderboard dataset on Hugging Face (CC BY 4.0); Epoch AI, ‘Capabilities & benchmarking’ (CC BY 4.0); API list prices via LiteLLM's price table (MIT); each price links to the developer's pricing page; Source: OpenRouter (openrouter.ai), licensed under CC BY 4.0: reuse and republish with attribution to OpenRouter..