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 3.5 Flash?
Gemini 3.5 Flash is a model from Google DeepMind, released on May 19, 2026. Its SI-IQ is 126 (90% interval 123–129), estimated from 9 benchmark results by 2 independent evaluators. Its strongest area is Knowledge and its weakest is Math.
Facts
- Developer
- Google DeepMind
- Released
- May 19, 2026
- Access
- API access
- Benchmarks used
- 9 results from 2 evaluators
- API price
- $1.50 input / $9.00 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 | 45.0% | Epoch AI | Epoch AI Benchmarking Hub · data file |
| Mystery Game Puzzles | 32.0% | 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 | 62.8% | 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) | 79.3% | Epoch AI | Epoch AI Benchmarking Hub · data file |
| GPQA Diamond | 92.8% | Epoch AI | Epoch AI Benchmarking Hub · data file |
| GPQA Diamond (OpenRouter run) | 92.4% | OpenRouter | OpenRouter benchmark datasets · data file |
| SimpleQA Verified | 66.2% | Epoch AI | Epoch AI Benchmarking Hub · data file |
| τ²-bench Airline (OpenRouter run) | 73.3% | OpenRouter | OpenRouter benchmark datasets · data file |
Models with similar SI-IQ
| Model | SI-IQ | |
|---|---|---|
| Grok 4.6xAI | 126 | Gemini 3.5 Flash vs Grok 4.6 |
| Claude Sonnet 5Anthropic | 126 | Gemini 3.5 Flash vs Claude Sonnet 5 |
| Gemini 3.1 ProGoogle DeepMind | 127 | Gemini 3.5 Flash vs Gemini 3.1 Pro |
| Claude Opus 4.7Anthropic | 127 | Gemini 3.5 Flash vs Claude Opus 4.7 |
| Kimi K3Moonshot | 127 | Gemini 3.5 Flash vs Kimi K3 |
Computed with SI-IQ method version 1.0.0. Read the full methodology
Data sources: 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..