What is Claude Archive?

Claude Archive is an independent, primary-source archive of Claude model launches, deprecations, pricing history, and published system-prompt updates.

Is Claude Archive affiliated with Anthropic?

No. Claude Archive is an independent educational publication and is not affiliated with Anthropic.

Independent Claude history archive

The source trail for Claude model history.

Claude Archive preserves launch dates, model IDs, deprecations, pricing milestones, and published system-prompt history from primary sources. Verified July 6, 2026.

Read the timeline Check retirements

Archive-style graphic showing Claude model history documents and dates — Historical source index, not a product site.

Fast citations

High-signal facts

First public Claude launch Mar 14, 2023 Claude 2 retirement Jul 21, 2025 Latest Sonnet launch in archive Jun 30, 2026 Initial verification pass July 6, 2026

Latest archive snapshot

Newest timeline entries

The latest entries belong here only when they alter the historical record, model status, pricing, prompt publication, or migration guidance.

2026-06-30

Claude Sonnet 5

Sonnet 5 launches as the newest Sonnet model with introductory $2/$10 per MTok pricing through August 31, 2026.

Source: Introducing Claude Sonnet 5

2026-06-09

Claude Fable 5 and Mythos 5

Anthropic launches Fable 5 for general use and Mythos 5 for limited approved cybersecurity access.

Source: Claude Fable 5 and Claude Mythos 5

2026-05-28

Claude Opus 4.8

Opus 4.8 launches with effort controls, dynamic workflows, and cheaper fast mode than prior Opus fast mode.

Source: Introducing Claude Opus 4.8

2026-04-16

Claude Opus 4.7

Opus 4.7 launches with new cybersecurity safeguards and the same $5/$25 per MTok pricing as Opus 4.6.

Source: Introducing Claude Opus 4.7

2026-02-17

Claude Sonnet 4.6

Sonnet 4.6 becomes the default model for Free and Pro users and adds a 1M-token context-window beta.

Source: Introducing Claude Sonnet 4.6

Archive rooms

Start with the question you need to answer

Archive timeline

Claude Model Timeline

A dated Claude model timeline from the March 2023 Claude launch through Claude Sonnet 5 and Fable 5 in 2026.

Lifecycle archive

Claude Model Deprecation and Retirement Ledger

A source-cited ledger of deprecated and retired Claude model IDs, retirement dates, and official replacement guidance.

Price archive

Claude Pricing History

A historical guide to Claude API pricing milestones, context-window economics, caching discounts, batch pricing, and current rates.

Prompt archive

Claude System Prompt History

A guide to Anthropic-published Claude system-prompt release notes, update dates, scope limits, and safe citation boundaries.

Migration archive

Claude Historical Migration Map

A source-cited migration map for moving from retired or older Claude model IDs to currently recommended replacements.

Methodology

Claude Archive Source Index

The primary-source bibliography and editorial method behind Claude Archive.

Boundary note

Historical archive, not current hype.

Claude Archive does not duplicate weekly news, Claude Code tutorials, memory workflows, context-engineering guides, or session-log analysis. Those topics belong to sibling Claude Network sites. This site stays on dated, source-cited Claude history.