Gemini 3.1 Pro Preview vs GPT-5.5 (Xhigh)
Which is better for the money: Gemini 3.1 Pro Preview by Google or GPT-5.5 (Xhigh) 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 (Xhigh) scores 8.7 points higher (38.4 vs 29.7) but costs 2.7× as much to run the benchmark ($5294 vs $1935; flagship vs premium cost classes). Pick GPT-5.5 (Xhigh) when the extra intelligence is worth the premium, otherwise Gemini 3.1 Pro Preview.
| Metric | Gemini 3.1 Pro Preview | GPT-5.5 (Xhigh) | Difference |
|---|---|---|---|
| Intelligence (higher is better) | 29.7 | 38.4 | +29.3% GPT-5.5 (Xhigh) is 29.3% more intelligent |
| Total AA cost (lower is better) | $1,935.39 | $5,294.36 | +173.6% GPT-5.5 (Xhigh) is 2.7× more expensive |
| End-to-end time (lower is better) | 24.32s | 40.04s | +64.6% GPT-5.5 (Xhigh) is 64.6% slower |
| 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 (Xhigh) vs Gemini 3.1 Pro Preview: 29.3% more intelligence, 173.6% more cost to run the AA benchmark, and 64.6% slower 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 (Xhigh) is off the frontier: at the same or lower cost, Claude Opus 5.5 (Xhigh, Default Fallback) scores 56.00 for $4057.
Gemini 3.1 Pro PreviewGPT-5.5 (Xhigh)Today's Pareto frontierEvery other model
Matchup
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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 · Markdown: /api/v1/compare/gemini-3-1-pro-preview/gpt-5-5?format=md · llms.txt · agent skill