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Claude 2.1 vs o1

Anthropic Claude 2.1 vs OpenAI o1 — side-by-side specs.

Anthropic
Claude 2.1
OpenAI
o1
Overview
CompanyAnthropicOpenAI
Release dateNov 21 2023Dec 5 2024
Model type
Open sourceNoNo
Specifications
Parameters
Context window
Benchmarks
Timeline
Release gapClaude 2.1 shipped 380 days before o1

Which is better: Claude 2.1 or o1?

Claude 2.1 and o1 don't publish scores on any of the same benchmarks, so there's no direct head-to-head comparison. Claude 2.1 shipped 380 days before o1, 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 o1 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 o1 released?
o1 was released by OpenAI on Dec 5 2024.

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