token.app › Compare › Claude Opus 5 vs Gemini 3.1 Pro Preview
Claude Opus 5 vs Gemini 3.1 Pro Preview
Claude Opus 5 leads on 3 of 5 shared benchmarks. Gemini 3.1 Pro Preview is 2.2× cheaper per token on a blended 3:1 basis. Gemini 3.1 Pro Preview accepts the larger context window (1.0M).
Head to head
Blended price uses a 3:1 input:output mix
| Claude Opus 5 | Gemini 3.1 Pro Preview | |
|---|---|---|
| Provider | Anthropic | |
| Input $/1M | $5.00 | $2.00 |
| Output $/1M | $25.00 | $12.00 |
| Blended $/1M | $10.00 | $4.50 |
| Context window | 1M | 1.0M |
| Max output | 128K | 66K |
| Released | Jul 2026 | Feb 2026 |
| Licence | Proprietary | Proprietary |
| GPQA Diamond | 93.9% | 94.4% |
| FrontierMath T1–3 | 85.6% | 59.6% |
| FrontierMath T4 | 73.2% | 26.8% |
| SimpleQA Verified | 56.7% | 77.3% |
| OTIS Mock AIME | 98.9% | 95.6% |
Benchmark scores independently run and published by Epoch AI, 'AI Benchmarking Hub', used under CC BY 4.0. Only benchmarks with a score for BOTH models are compared.
Choose Claude Opus 5 if…
- Higher FrontierMath T1–3 (85.6% vs 59.6%)
- Higher FrontierMath T4 (73.2% vs 26.8%)
- Higher OTIS Mock AIME (98.9% vs 95.6%)
- Newer model (released Jul 2026)
Choose Gemini 3.1 Pro Preview if…
- Costs less per token — $4.50 vs $10.00 blended
- Higher GPQA Diamond (94.4% vs 93.9%)
- Higher SimpleQA Verified (77.3% vs 56.7%)
- Larger context window (1.0M)
FAQ
Which is better, Claude Opus 5 or Gemini 3.1 Pro Preview?
Across the 5 benchmarks both models have independently-run scores for, Claude Opus 5 leads on 3 and Gemini 3.1 Pro Preview leads on 2. Benchmarks are one input — price and context window are on this page too.
Is Claude Opus 5 cheaper than Gemini 3.1 Pro Preview?
Gemini 3.1 Pro Preview is cheaper: $4.50 versus $10.00 per million tokens blended at 3:1 input:output. Input alone: $5.00 vs $2.00. Output alone: $25.00 vs $12.00.
What context windows do Claude Opus 5 and Gemini 3.1 Pro Preview have?
Claude Opus 5: 1,000,000 tokens. Gemini 3.1 Pro Preview: 1,048,576 tokens.
Who makes Claude Opus 5 and Gemini 3.1 Pro Preview?
Claude Opus 5 is made by Anthropic. Gemini 3.1 Pro Preview is made by Google.