Gemini 3.1 Pro Preview vs GPT-5.5 (Medium)
Which is better for the money: Gemini 3.1 Pro Preview by Google or GPT-5.5 (Medium) by OpenAI? Intelligence, total benchmark cost, and end-to-end time from Artificial Analysis & other sources, snapshot 2026-10-25.
Trade-off
Verdict
Depends on your budget
GPT-5.5 (Medium) scores 4.1 points higher (33.8 vs 29.7) but costs 1.1× as much to run the benchmark ($2095 vs $1935; flagship vs premium cost classes). Pick GPT-5.5 (Medium) when the extra intelligence is worth the premium, otherwise Gemini 3.1 Pro Preview.
| Metric | Gemini 3.1 Pro Preview | GPT-5.5 (Medium) | Difference |
|---|---|---|---|
| Intelligence (higher is better) | 29.7 | 33.8 | +13.8% GPT-5.5 (Medium) is 13.8% more intelligent |
| Total AA cost (lower is better) | $1,935.39 | $2,095.12 | +8.3% GPT-5.5 (Medium) is 8.3% more expensive |
| End-to-end time (lower is better) | 24.47s | 12.63s | −48.4% GPT-5.5 (Medium) is 48.4% faster |
| Price per 1M tokens (in / out) | $2.00 / $12.0 | $5.00 / $30.0 | |
| Input modalities | Text, Image, Speech, Video | Text, Image |
GPT-5.5 (Medium) vs Gemini 3.1 Pro Preview: 13.8% more intelligence, 8.3% more cost to run the AA benchmark, and 48.4% faster end-to-end.
Today's Pareto frontier
Against the frontier
- Gemini 3.1 Pro Preview is off the frontier: at the same or lower cost, GPT-6.1 Sol (Max) scores 51.80 for $1082.
- GPT-5.5 (Medium) is off the frontier: at the same or lower cost, GPT-6.1 Sol (Max) scores 51.80 for $1082.
Gemini 3.1 Pro PreviewGPT-5.5 (Medium)Today's Pareto frontierEvery other model
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Accept: text/markdown or ?format=md returns this page as Markdown. JSON: /api/v1/compare/gemini-3-1-pro-preview/gpt-5-5-medium · Markdown: /api/v1/compare/gemini-3-1-pro-preview/gpt-5-5-medium?format=md · llms.txt · agent skill