token.app › Compare › Gemini 2.5 Flash vs Claude Opus 5
Gemini 2.5 Flash vs Claude Opus 5
Claude Opus 5 leads on 1 of 1 shared benchmarks. Gemini 2.5 Flash is 12× cheaper per token on a blended 3:1 basis. Gemini 2.5 Flash accepts the larger context window (1.0M).
Head to head
Blended price uses a 3:1 input:output mix
| Gemini 2.5 Flash | Claude Opus 5 | |
|---|---|---|
| Provider | Anthropic | |
| Input $/1M | $0.300 | $5.00 |
| Output $/1M | $2.50 | $25.00 |
| Blended $/1M | $0.850 | $10.00 |
| Context window | 1.0M | 1M |
| Max output | 66K | 128K |
| Released | Jun 2025 | Jul 2026 |
| Licence | Proprietary | Proprietary |
| OTIS Mock AIME | 70.8% | 98.9% |
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 Gemini 2.5 Flash if…
- Costs less per token — $0.850 vs $10.00 blended
- Larger context window (1.0M)
Choose Claude Opus 5 if…
- Higher OTIS Mock AIME (98.9% vs 70.8%)
- Newer model (released Jul 2026)
FAQ
Which is better, Gemini 2.5 Flash or Claude Opus 5?
Across the 1 benchmark both models have independently-run scores for, Gemini 2.5 Flash leads on 0 and Claude Opus 5 leads on 1. Benchmarks are one input — price and context window are on this page too.
Is Gemini 2.5 Flash cheaper than Claude Opus 5?
Gemini 2.5 Flash is cheaper: $0.850 versus $10.00 per million tokens blended at 3:1 input:output. Input alone: $0.300 vs $5.00. Output alone: $2.50 vs $25.00.
What context windows do Gemini 2.5 Flash and Claude Opus 5 have?
Gemini 2.5 Flash: 1,048,576 tokens. Claude Opus 5: 1,000,000 tokens.
Who makes Gemini 2.5 Flash and Claude Opus 5?
Gemini 2.5 Flash is made by Google. Claude Opus 5 is made by Anthropic.
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