Leaderboard · Compare · Claude Opus 4.1 vs Gemini 2.5 Pro · Updated
Claude Opus 4.1 vs Gemini 2.5 Pro
Claude Opus 4.1 edges out Gemini 2.5 Pro on the composite (83.6 vs 80.9). The gap is meaningful but not decisive — see the per-benchmark breakdown below.
At a glance
| Spec | Claude Opus 4.1 | Gemini 2.5 Pro |
|---|---|---|
| Provider | Anthropic | |
| Released | 2025-08 | 2025-03 |
| Tier | frontier | frontier |
| License | Closed | Closed |
| Context window | 200k | 2M |
| $ in / out (per 1M) | $15.00 / $75.00 | $1.25 / $10.00 |
Benchmark scoreboard
Higher is better on every benchmark. Δ shows Claude Opus 4.1 − Gemini 2.5 Pro.
| Benchmark | Claude Opus 4.1 | Gemini 2.5 Pro | Δ |
|---|---|---|---|
| Chatbot Arena Elo | 1390 | 1380 | +10 |
| MMLU-Pro | 87.0 | 86.0 | +1.0 |
| GPQA Diamond | 79.6 | 84.0 | -4.4 |
| MATH | 95.0 | 92.0 | +3.0 |
| HumanEval | 95.4 | 92.0 | +3.4 |
| SWE-Bench Verified | 74.5 | 63.8 | +10.7 |
Numbers compiled from provider technical reports and Chatbot Arena snapshots — see methodology.
OpenRouter routes Claude Opus 4.1, Gemini 2.5 Pro, and 100+ other LLMs behind a single API key — pay-as-you-go, no monthly minimum, fallback if a provider is down. Try OpenRouter → (affiliate · supports this site)
Claude Opus 4.1 vs Gemini 2.5 Pro: where each one wins
Claude Opus 4.1 is stronger on
- Arena
- MMLU-Pro
- MATH
- HumanEval
- SWE-Bench
Gemini 2.5 Pro is stronger on
- GPQA
Cost comparison
At 10M tokens/day (50/50 split), Claude Opus 4.1 costs ~$450.00/day vs $56.25/day for Gemini 2.5 Pro — Gemini 2.5 Pro is the cheaper pick at this volume.
Verdict
Claude Opus 4.1 edges out Gemini 2.5 Pro on the composite (83.6 vs 80.9). The gap is meaningful but not decisive — see the per-benchmark breakdown below.
If you can only pick one and your workload is unclear, route via OpenRouter and switch by request — same key, no lock-in.
Frequently asked questions
Which is better, Claude Opus 4.1 or Gemini 2.5 Pro?
Claude Opus 4.1 edges out Gemini 2.5 Pro on the composite (83.6 vs 80.9). The gap is meaningful but not decisive — see the per-benchmark breakdown below. Claude Opus 4.1 wins on Arena, MMLU-Pro, MATH, HumanEval, SWE-Bench; Gemini 2.5 Pro wins on GPQA.
What does Claude Opus 4.1 cost compared to Gemini 2.5 Pro?
At 10M tokens/day (50/50 split), Claude Opus 4.1 costs ~$450.00/day vs $56.25/day for Gemini 2.5 Pro — Gemini 2.5 Pro is the cheaper pick at this volume.
What is the context window of Claude Opus 4.1 vs Gemini 2.5 Pro?
Claude Opus 4.1: 200k tokens. Gemini 2.5 Pro: 2M tokens. Gemini 2.5 Pro has the larger window — useful for long-document RAG and full-codebase prompting.
Is Claude Opus 4.1 or Gemini 2.5 Pro open source?
Claude Opus 4.1: closed / proprietary. Gemini 2.5 Pro: closed / proprietary.
Can I try Claude Opus 4.1 and Gemini 2.5 Pro on the same API key?
Yes — OpenRouter routes both models behind a single key, so you can A/B test Claude Opus 4.1 against Gemini 2.5 Pro without juggling provider accounts.
Model deep-dives: Claude Opus 4.1 · Gemini 2.5 Pro · Full leaderboard
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