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Claude Sonnet 4 vs o1

2 vs 0 benchmarks won

Anthropic
Claude Sonnet 4
OpenAI
o1
Overview
CompanyAnthropicOpenAI
Release dateMay 22 2025Dec 5 2024
Model type
Open sourceNoNo
Specifications
Parameters
Context window
Benchmarks
Science reasoning
GPQA Diamond
75.4%
Software engineering
SWE-Bench Verified
72.7%
Multimodal understanding
MMMU
Timeline
Release gapo1 shipped 168 days before Claude Sonnet 4

Which is better: Claude Sonnet 4 or o1?

Claude Sonnet 4 leads o1 on 2 of the tracked benchmarks (GPQA Diamond, SWE-Bench Verified, MMMU). o1 shipped 168 days before Claude Sonnet 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 — at least one of these models has not published scores on GPQA Diamond, SWE-Bench Verified, or MMMU.

Frequently asked questions

When was Claude Sonnet 4 released?
Claude Sonnet 4 was released by Anthropic on May 22 2025.
When was o1 released?
o1 was released by OpenAI on Dec 5 2024.

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