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Gemini 3.1 Pro vs GPT-5 Pro
Gemini 3.1 Pro (Google DeepMind) and GPT-5 Pro (OpenAI) compared on benchmarks, pricing, context window, and use-case rankings.
- Gemini 3.1 Pro leads on overall intelligence (ECI 155 vs 150).
| Attribute | Gemini 3.1 Pro | GPT-5 Pro |
|---|---|---|
| Scores | ||
| Intelligence (ECI) | 155 | 150 |
| Coding | 65 | — |
| Math | 74 | 71 |
| Reasoning & Knowledge | 94 | 54 |
| Agentic & Tools | 83 | — |
| Specifications | ||
| Developer | Google DeepMind | OpenAI |
| Family | Gemini | GPT |
| Released | Feb 19, 2026 | Oct 7, 2025 |
| Parameters | — | — |
| Availability | API access | API access |
| Context window | — | 400K |
| Price — $/M input | — | $15.00 |
| Price — $/M output | — | $120.00 |
| Inputs | — | image, text, file |
| Outputs | — | text |
| Benchmarks | ||
| AIME 2024/2025 | 96% | — |
| APEX | 34% | — |
| ARC-AGI | 98% | 70% |
| ARC-AGI-2 | 77% | 18% |
| FrontierMath | 37% | — |
| FrontierMath Tier 4 | 17% | 15% |
| GPQA Diamond | 94% | — |
| GSO (code optimization) | 23% | — |
| Humanity's Last Exam | 46% | 32% |
| METR task horizon | 6.4 h | — |
| SimpleBench | 80% | 62% |
| SimpleQA Verified | 77% | — |
| SWE-bench Verified | 76% | — |
| Terminal-Bench | 80% | — |
| WebDev Arena | 1461 | — |
| WeirdML | 72% | 60% |
Use-case scores are 0–100 percentile composites across each area’s benchmarks, ranked against every model from the past year. Highlighted cells lead each row. Open a model for the full picture.
Frequently asked questions
Is Gemini 3.1 Pro better than GPT-5 Pro?
On Epoch AI's Capabilities Index, Gemini 3.1 Pro scores higher (155) than GPT-5 Pro (150). The right pick depends on your task — compare their coding, math, and reasoning scores in the table above.
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Benchmarks & model data from Epoch AI (CC BY); pricing & specs from OpenRouter. ECI = Epoch Capabilities Index.