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Map / Core AI / Foundation Models / Claude / Legacy

Claude (legacy)

by Anthropic · part of Claude · Text

Anthropic's first-generation Claude and Claude Instant models from 2023, before the Opus / Sonnet / Haiku tiers.

Retired

21 Jul 2025The last version was Legacy 2.1, from 21 Nov 2023

Versions

3since Claude 1 in March 2023

All versions

VersionReleasedAfter previousStatusComes asSource
Claude 2.121 Nov 2023133 daysRetiredanthropic.com
Claude 211 Jul 2023119 daysRetiredanthropic.com
Claude 114 Mar 2023FirstRetiredClaude Instant 1anthropic.com

Dates from Anthropic's own announcements; each row links to its source.

The Claude family

2023202420252026TodayOpusClaude 3 Opus (Claude Opus 3), 4 Mar 20243Claude Opus 4, 22 May 20254Claude Opus 4.1, 5 Aug 20254.1Claude Opus 4.5, 24 Nov 20254.5Claude Opus 4.6, 5 Feb 20264.6Claude Opus 4.7, 16 Apr 20264.7Claude Opus 4.8, 28 May 2026Claude Opus 5, 24 Jul 20265Claude Opus 5.5, 22 Sep 20265.5SonnetClaude 3 Sonnet (Claude Sonnet 3), 4 Mar 20243Claude 3.5 Sonnet (Claude Sonnet 3.5), 20 Jun 20243.5Claude 3.7 Sonnet (Claude Sonnet 3.7), 24 Feb 20253.7Claude Sonnet 4, 22 May 20254Claude Sonnet 4.5, 29 Sep 20254.5Claude Sonnet 4.6, 17 Feb 20264.6Claude Sonnet 5, 30 Jun 20265Claude Sonnet 5.5, 28 Sep 20265.5HaikuClaude 3 Haiku (Claude Haiku 3), 13 Mar 20243Claude 3.5 Haiku (Claude Haiku 3.5), 4 Nov 20243.5Claude Haiku 4.5, 15 Oct 20254.5Claude Haiku 5.5, 7 Oct 20265.5FableClaude Fable 5, 9 Jun 20265Claude Fable 5.1, 1 Sep 20265.1LegacyClaude 1, 14 Mar 20231Claude 2, 11 Jul 20232Claude 2.1, 21 Nov 20232.1

VersionPreviewLatest version

Questions

What is the latest version of Claude (legacy)?

Claude (legacy) was retired on 21 Jul 2025. Its last version was Claude 2.1, released on 21 Nov 2023.

When was Claude 2 released?

Claude 2 came out on 11 Jul 2023.

When was Claude 1 released?

Claude 1 came out on 14 Mar 2023.