GPT-5.5 ProvsGemini 3.1 Pro Preview
Across 7 shared benchmarks, GPT-5.5 Pro leads overall: GPT-5.5 Pro wins 5, Gemini 3.1 Pro Preview wins 2, with 0 ties and an average score difference of +7.55.
GPT-5.5 Pro
OpenAI · 2026-04-23 · Reasoning model
Gemini 3.1 Pro Preview
Google Deep Mind · 2026-02-20 · Multimodal model
GPT-5.5 Pro5 wins(71%)(29%)2 winsGemini 3.1 Pro Preview
Benchmark scores
Grouped by capability, sorted by largest gap within each. 7 shared benchmarks.
General Knowledge
GPT-5.5 Pro 2/2| Benchmark | GPT-5.5 Pro | Gemini 3.1 Pro Preview | Diff |
|---|---|---|---|
| ARC-AGI-2 | 84.604 / 62Thinking High (No Tools) | 77.109 / 62Thinking High (No Tools) | +7.50 |
| HLE | 57.2010 / 181极高强度思考（工具） | 51.4024 / 181Thinking High (With Tools) | +5.80 |
Math and Reasoning
GPT-5.5 Pro 2/2| Benchmark | GPT-5.5 Pro | Gemini 3.1 Pro Preview | Diff |
|---|---|---|---|
| FrontierMath - Tier 4 | 39.601 / 80Thinking High (No Tools) | 16.7020 / 80Normal (No Tools) | +22.90 |
| FrontierMath | 52.401 / 60极高强度思考（工具） | 36.9011 / 60Thinking High (No Tools) | +15.50 |
AI Agent - Information Search
GPT-5.5 Pro 1/1| Benchmark | GPT-5.5 Pro | Gemini 3.1 Pro Preview | Diff |
|---|---|---|---|
| BrowseComp | 90.103 / 54Deep Thinking (With Tools + Internet) | 85.905 / 54Thinking High (With Tools + Internet) | +4.20 |
Commonsense Reasoning
Gemini 3.1 Pro Preview 1/1| Benchmark | GPT-5.5 Pro | Gemini 3.1 Pro Preview | Diff |
|---|---|---|---|
| SimpleBench | 76.903 / 67Normal (No Tools) | 79.602 / 67Normal (No Tools) | -2.70 |
General Evaluation
Gemini 3.1 Pro Preview 1/1| Benchmark | GPT-5.5 Pro | Gemini 3.1 Pro Preview | Diff |
|---|---|---|---|
| GPQA Diamond | 93.928 / 226极高强度思考（无工具） | 94.304 / 226Thinking High (No Tools) | -0.38 |
Specs
| Field | GPT-5.5 Pro | Gemini 3.1 Pro Preview |
|---|---|---|
| Publisher | OpenAI | Google Deep Mind |
| Release date | 2026-04-23 | 2026-02-20 |
| Model type | Reasoning model | Multimodal model |
| Architecture | Dense | Dense |
| Parameters | Not available | Not available |
| Context length | 1000K | 1M |
| Max output | 128K | 64K |
API pricing
Prices use DataLearner records when available; missing fields are not inferred.
| Item | GPT-5.5 Pro | Gemini 3.1 Pro Preview |
|---|---|---|
| Text input | $30 / 1M tokens | $2 / 1M tokens |
| Text output | $180 / 1M tokens | $12 / 1M tokens |
Summary
- GPT-5.5 Proleads in:General Knowledge (2/2), Math and Reasoning (2/2), AI Agent - Information Search (1/1)
- Gemini 3.1 Pro Previewleads in:Commonsense Reasoning (1/1), General Evaluation (1/1)
On average across the 7 shared benchmarks, GPT-5.5 Pro scores 7.55 higher.
Largest single-benchmark gap: FrontierMath - Tier 4 — GPT-5.5 Pro 39.60 vs Gemini 3.1 Pro Preview 16.70 (+22.90).
Page generated from structured model, pricing and benchmark records. No real-time LLM is used to write the prose.