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

Claude 2 vs Claude 3.5 Sonnet (upgraded)

Anthropic
Claude 2
Anthropic
Claude 3.5 Sonnet (upgraded)
Overview
CompanyAnthropicAnthropic
Release dateJul 11 2023Oct 22 2024
AccessProprietaryProprietary
Benchmarks
Coding
SWE-Bench Verified
49%
Timeline
Release gapClaude 2 shipped 469 days before Claude 3.5 Sonnet (upgraded)

Which is better: Claude 2 or Claude 3.5 Sonnet (upgraded)?

Claude 2 and Claude 3.5 Sonnet (upgraded) don't publish scores on any of the same benchmarks, so there's no direct head-to-head comparison. Claude 2 shipped 469 days before Claude 3.5 Sonnet (upgraded), 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 and Claude 3.5 Sonnet (upgraded) don't publish scores on any of the same benchmarks.

Frequently asked questions

Claude 2 was released by Anthropic on Jul 11 2023.

Claude 3.5 Sonnet (upgraded) was released by Anthropic on Oct 22 2024.

Other comparisons