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Claude 2.1 vs o4-mini-high

Anthropic Claude 2.1 vs OpenAI o4-mini-high — side-by-side specs.

Anthropic
Claude 2.1
OpenAI
o4-mini-high
Overview
CompanyAnthropicOpenAI
Release dateNov 21 2023Apr 16 2025
Model type
Open sourceNoNo
Specifications
Parameters
Context window
Benchmarks
Timeline
Release gapClaude 2.1 shipped 512 days before o4-mini-high

Which is better: Claude 2.1 or o4-mini-high?

Claude 2.1 and o4-mini-high don't publish scores on any of the same benchmarks, so there's no direct head-to-head comparison. Claude 2.1 shipped 512 days before o4-mini-high, 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 2.1 and o4-mini-high don't publish scores on any of the same benchmarks.

Frequently asked questions

When was Claude 2.1 released?
Claude 2.1 was released by Anthropic on Nov 21 2023.
When was o4-mini-high released?
o4-mini-high was released by OpenAI on Apr 16 2025.

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