Claude Opus 4.8vsGemini 3.1 Pro Preview
Across 13 shared benchmarks, Claude Opus 4.8 leads overall: Claude Opus 4.8 wins 8, Gemini 3.1 Pro Preview wins 5, with 0 ties and an average score difference of +12.04.
Claude Opus 4.8
Anthropic · 2026-05-28 · Reasoning model
Gemini 3.1 Pro Preview
Google Deep Mind · 2026-02-20 · Multimodal model
Claude Opus 4.88 wins(62%)(38%)5 winsGemini 3.1 Pro Preview
Benchmark scores
Grouped by capability, sorted by largest gap within each. 13 shared benchmarks.
Coding and Software Engineer
Claude Opus 4.8 4/5| Benchmark | Claude Opus 4.8 | Gemini 3.1 Pro Preview | Diff |
|---|---|---|---|
| Text Arena (Coding) | 1,5459 / 35Normal (No Tools) | 1,46123 / 35Normal (No Tools) | +83.56 |
| DeepSWE | 5913 / 27Deep Thinking (With Tools) | 1227 / 27Thinking High (With Tools) | +47 |
| SWE-Bench Pro - Public | 69.204 / 57Extended (with tools) | 54.2034 / 57Thinking High (With Tools) | +15 |
| SWE-bench Verified | 88.605 / 114Extended (with tools) | 80.6011 / 114Thinking High (With Tools) | +8 |
| WeirdML v2 | 70.4518 / 52Normal (With Tools) | 72.1017 / 52Normal (With Tools) | -1.65 |
AI Agent - Tool Usage
Claude Opus 4.8 3/3| Benchmark | Claude Opus 4.8 | Gemini 3.1 Pro Preview | Diff |
|---|---|---|---|
| OSWorld-Verified | 83.404 / 26Extended (with tools) | 76.2012 / 26Thinking (With Tools) | +7.20 |
| Terminal-Bench 2.1 | 78.9020 / 44Thinking High (With Tools) | 73.8028 / 44Thinking High (With Tools) | +5.10 |
| MCP-Atlas | 82.206 / 38Deep Thinking (With Tools) | 78.2012 / 38Thinking High (With Tools) | +4 |
General Knowledge
Even 2/2| Benchmark | Claude Opus 4.8 | Gemini 3.1 Pro Preview | Diff |
|---|---|---|---|
| HLE | 57.908 / 181Extended (with tools) | 51.4024 / 181Thinking High (With Tools) | +6.50 |
| LiveBench | 78.794 / 115Deep Thinking (No Tools) | 79.933 / 115Thinking High (No Tools) | -1.14 |
AI Agent - Information Search
Gemini 3.1 Pro Preview 1/1| Benchmark | Claude Opus 4.8 | Gemini 3.1 Pro Preview | Diff |
|---|---|---|---|
| BrowseComp | 84.309 / 54Thinking High (With Tools + Internet) | 85.905 / 54Thinking High (With Tools + Internet) | -1.60 |
Commonsense Reasoning
Gemini 3.1 Pro Preview 1/1| Benchmark | Claude Opus 4.8 | Gemini 3.1 Pro Preview | Diff |
|---|---|---|---|
| SimpleBench | 64.8010 / 67Normal (No Tools) | 79.602 / 67Normal (No Tools) | -14.80 |
General Evaluation
Gemini 3.1 Pro Preview 1/1| Benchmark | Claude Opus 4.8 | Gemini 3.1 Pro Preview | Diff |
|---|---|---|---|
| GPQA Diamond | 93.6011 / 226Thinking High (No Tools) | 94.304 / 226Thinking High (No Tools) | -0.70 |
Specs
| Field | Claude Opus 4.8 | Gemini 3.1 Pro Preview |
|---|---|---|
| Publisher | Anthropic | Google Deep Mind |
| Release date | 2026-05-28 | 2026-02-20 |
| Model type | Reasoning model | Multimodal model |
| Architecture | Dense | Dense |
| Parameters | Not available | Not available |
| Context length | 1M | 1M |
| Max output | 125K | 64K |
API pricing
Prices use DataLearner records when available; missing fields are not inferred.
| Item | Claude Opus 4.8 | Gemini 3.1 Pro Preview |
|---|---|---|
| Text input | $5 / 1M tokens | $2 / 1M tokens |
| Text output | $25 / 1M tokens | $12 / 1M tokens |
| Cache read | $0.5 / 1M tokens | Not public |
| Cache write | $6.25 / 1M tokens | Not public |
Summary
- Claude Opus 4.8leads in:Coding and Software Engineer (4/5), AI Agent - Tool Usage (3/3)
- Gemini 3.1 Pro Previewleads in:AI Agent - Information Search (1/1), Commonsense Reasoning (1/1), General Evaluation (1/1)
- Tied in:General Knowledge
On average across the 13 shared benchmarks, Claude Opus 4.8 scores 12.04 higher.
Largest single-benchmark gap: Text Arena (Coding) — Claude Opus 4.8 1,545 vs Gemini 3.1 Pro Preview 1,461 (+83.56).
Page generated from structured model, pricing and benchmark records. No real-time LLM is used to write the prose.