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Claude 2.1 vs o3-mini-high

Anthropic Claude 2.1 vs OpenAI o3-mini-high — side-by-side specs.

Anthropic
Claude 2.1
OpenAI
o3-mini-high
Overview
CompanyAnthropicOpenAI
Release dateNov 21 2023Jan 31 2025
Model type
Open sourceNoNo
Specifications
Parameters
Context window
Benchmarks
Timeline
Release gapClaude 2.1 shipped 437 days before o3-mini-high

Which is better: Claude 2.1 or o3-mini-high?

Claude 2.1 and o3-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 437 days before o3-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 o3-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 o3-mini-high released?
o3-mini-high was released by OpenAI on Jan 31 2025.

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