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Claude Opus 4 vs Gemini 1.5 Flash

Anthropic Claude Opus 4 vs Google Gemini 1.5 Flash — side-by-side specs.

Anthropic
Claude Opus 4
Google
Gemini 1.5 Flash
Overview
CompanyAnthropicGoogle
Release dateMay 22 2025May 14 2024
Model type
Open sourceNoNo
Specifications
Parameters
Context window
Benchmarks
Coding
SWE-Bench Verified
72.5%
Science
GPQA Diamond
79.6%
Timeline
Release gapGemini 1.5 Flash shipped 373 days before Claude Opus 4

Which is better: Claude Opus 4 or Gemini 1.5 Flash?

Claude Opus 4 and Gemini 1.5 Flash don't publish scores on any of the same benchmarks, so there's no direct head-to-head comparison. Gemini 1.5 Flash shipped 373 days before Claude Opus 4, 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 — Claude Opus 4 and Gemini 1.5 Flash don't publish scores on any of the same benchmarks.

Frequently asked questions

When was Claude Opus 4 released?
Claude Opus 4 was released by Anthropic on May 22 2025.
When was Gemini 1.5 Flash released?
Gemini 1.5 Flash was released by Google on May 14 2024.

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