When was Claude Opus 4.6 released?

Claude Opus 4.6 was released by Anthropic on Feb 5 2026.

When was GPT-5.1 released?

GPT-5.1 was released by OpenAI on Nov 12 2025.

Which is better on GPQA Diamond, Claude Opus 4.6 or GPT-5.1?

Claude Opus 4.6 scores higher on GPQA Diamond — Claude Opus 4.6 91.3% vs GPT-5.1 88.1%.

Which is better at coding, Claude Opus 4.6 or GPT-5.1?

On SWE-Bench Verified (real-world software-engineering tasks), Claude Opus 4.6 leads — Claude Opus 4.6 scores 80.8% and GPT-5.1 scores 76.3%.

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Home/Compare/Claude Opus 4.6 vs GPT-5.1

Claude Opus 4.6 vs GPT-5.1

2 vs 1 benchmarks won

	Anthropic Claude Opus 4.6	OpenAI GPT-5.1
Overview
Company	Anthropic	OpenAI
Release date	Feb 5 2026	Nov 12 2025
Model type	—	—
Open source	No	No
Specifications
Parameters	—	—
Context window	—	—
Benchmarks
Science reasoning GPQA Diamond	91.3%	88.1%
Software engineering SWE-Bench Verified	80.8%	76.3%
Multimodal understanding MMMU	—	76%
Timeline
Release gap	GPT-5.1 shipped 85 days before Claude Opus 4.6

Which is better: Claude Opus 4.6 or GPT-5.1?

Claude Opus 4.6 leads GPT-5.1 on 2 of the tracked benchmarks (GPQA Diamond, SWE-Bench Verified, MMMU). GPT-5.1 shipped 85 days before Claude Opus 4.6, 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, Claude Opus 4.6 scores 91.3%, 3.2 points above GPT-5.1 at 88.1%. On SWE-Bench Verified, Claude Opus 4.6 scores 80.8%, 4.5 points above GPT-5.1 at 76.3%.

Frequently asked questions

When was Claude Opus 4.6 released?: Claude Opus 4.6 was released by Anthropic on Feb 5 2026.
When was GPT-5.1 released?: GPT-5.1 was released by OpenAI on Nov 12 2025.
Which is better on GPQA Diamond, Claude Opus 4.6 or GPT-5.1?: Claude Opus 4.6 scores higher on GPQA Diamond — Claude Opus 4.6 91.3% vs GPT-5.1 88.1%.
Which is better at coding, Claude Opus 4.6 or GPT-5.1?: On SWE-Bench Verified (real-world software-engineering tasks), Claude Opus 4.6 leads — Claude Opus 4.6 scores 80.8% and GPT-5.1 scores 76.3%.