AI Model Release Tracker - Timeline of Major AI Models from 2022-2026

Claude 2.1 vs o1

Anthropic
Claude 2.1
OpenAI
o1
Overview
CompanyAnthropicOpenAI
Release dateNov 21 2023Dec 5 2024
AccessProprietaryProprietary
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

Claude 2.1 was released by Anthropic on Nov 21 2023.

o1 was released by OpenAI on Dec 5 2024.

Other comparisons