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Claude Opus 4.1 vs Gemini 2.5 Flash

2 vs 0 benchmarks won

Anthropic
Claude Opus 4.1
Google
Gemini 2.5 Flash
Overview
CompanyAnthropicGoogle
Release dateAug 5 2025Apr 17 2025
Model type
Open sourceNoNo
Specifications
Parameters
Context window
Benchmarks
Science reasoning
GPQA Diamond
80.9%
Software engineering
SWE-Bench Verified
74.5%
Multimodal understanding
MMMU
Timeline
Release gapGemini 2.5 Flash shipped 110 days before Claude Opus 4.1

Which is better: Claude Opus 4.1 or Gemini 2.5 Flash?

Claude Opus 4.1 leads Gemini 2.5 Flash on 2 of the tracked benchmarks (GPQA Diamond, SWE-Bench Verified, MMMU). Gemini 2.5 Flash shipped 110 days before Claude Opus 4.1, so benchmark comparisons should account for the intervening progress.

Published specifications for these two models are limited — see each model page for the latest details.

Direct benchmark comparisons are unavailable — at least one of these models has not published scores on GPQA Diamond, SWE-Bench Verified, or MMMU.

Frequently asked questions

When was Claude Opus 4.1 released?
Claude Opus 4.1 was released by Anthropic on Aug 5 2025.
When was Gemini 2.5 Flash released?
Gemini 2.5 Flash was released by Google on Apr 17 2025.

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