When was Claude Opus 4.5 released?

Claude Opus 4.5 was released by Anthropic on Nov 24 2025.

When was Gemini 3.1 Pro released?

Gemini 3.1 Pro was released by Google on Feb 19 2026.

Which is better on GPQA Diamond, Claude Opus 4.5 or Gemini 3.1 Pro?

Gemini 3.1 Pro scores higher on GPQA Diamond — Claude Opus 4.5 87% vs Gemini 3.1 Pro 94.3%.

Which is better at coding, Claude Opus 4.5 or Gemini 3.1 Pro?

On SWE-Bench Verified (real-world software-engineering tasks), Claude Opus 4.5 leads — Claude Opus 4.5 scores 80.9% and Gemini 3.1 Pro scores 80.6%.

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Claude Opus 4.5 vs Gemini 3.1 Pro

1 vs 1 benchmarks won

	Anthropic Claude Opus 4.5	Google Gemini 3.1 Pro
Overview
Company	Anthropic	Google
Release date	Nov 24 2025	Feb 19 2026
Model type	—	—
Open source	No	No
Specifications
Parameters	—	—
Context window	—	—
Benchmarks
Science reasoning GPQA Diamond	87%	94.3%
Software engineering SWE-Bench Verified	80.9%	80.6%
Multimodal understanding MMMU	—	—
Timeline
Release gap	Claude Opus 4.5 shipped 87 days before Gemini 3.1 Pro

Which is better: Claude Opus 4.5 or Gemini 3.1 Pro?

Claude Opus 4.5 and Gemini 3.1 Pro are evenly matched across the benchmarks they both publish. Claude Opus 4.5 shipped 87 days before Gemini 3.1 Pro, 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.

On GPQA Diamond, Gemini 3.1 Pro scores 94.3%, 7.3 points above Claude Opus 4.5 at 87%. On SWE-Bench Verified, Claude Opus 4.5 scores 80.9%, 0.3 points above Gemini 3.1 Pro at 80.6%.

Frequently asked questions

When was Claude Opus 4.5 released?: Claude Opus 4.5 was released by Anthropic on Nov 24 2025.
When was Gemini 3.1 Pro released?: Gemini 3.1 Pro was released by Google on Feb 19 2026.
Which is better on GPQA Diamond, Claude Opus 4.5 or Gemini 3.1 Pro?: Gemini 3.1 Pro scores higher on GPQA Diamond — Claude Opus 4.5 87% vs Gemini 3.1 Pro 94.3%.
Which is better at coding, Claude Opus 4.5 or Gemini 3.1 Pro?: On SWE-Bench Verified (real-world software-engineering tasks), Claude Opus 4.5 leads — Claude Opus 4.5 scores 80.9% and Gemini 3.1 Pro scores 80.6%.