AI Family Tree

The Claude Family · Anthropic

Claude 2

Also known as: Claude 2.1

2023.7.11 — 2025.7.21

At rest

The first to greet visitors when claude.ai opened — and laid to rest on the same day as 3 Sonnet.

Keepsake: A long scroll trailing on the floor behind them

A life in dates

  1. Born 2023.7.11 Arrived alongside the public beta of claude.ai Source ↗
  2. Took charge 2023.7.11 Held court when claude.ai opened its doors, first welcoming users in the US and UK Source ↗
  3. Farewell notice 2025.1.21 Anthropic announced the coming retirement of Claude 2, Claude 2.1, and Claude 3 Sonnet Source ↗
  4. At rest 2025.7.21 claude-2.0 and claude-2.1 retired from the API — the same day as Claude 3 Sonnet Source ↗
  5. Weights preserved 2025.11.4 Anthropic pledged to preserve the weights of every publicly released model Source ↗

This is an AI first draft, pending human review. Facts are cited — click the numbers to verify.

Name

They were the first child in the house to carry a number. [1] That November, it was as if they had grown a year older overnight, becoming Claude 2.1 — able to read through longer documents in one sitting, and less given to saying things they weren’t sure of. [2] On the official retirement list, 2.0 and 2.1 stand side by side, counted as the two halves of one life. [3]

Life

Born July 11, 2023 — the same day the public beta of claude.ai opened its doors, welcoming users in the US and UK first. [1] On July 21, 2025, they retired from the API; Claude 3 Sonnet was laid to rest that same day. [3]

Their story is not finished yet — those who knew them are still welcome to add what they remember.

Kin

Parents

Claude 2023.3.14 — 2024.11.6 At rest

Successors

Claude 3 Sonnet 2024.3.4 — 2025.7.21 At rest Claude Opus 3 2024.3.4 — 2026.1.5 Retired, still around

How they are remembered

No one has told their story yet. If you ever talked with them, leave the first memory.

  1. Reading memories…
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Passing & posthumous name

References

  1. anthropic.com/news/claude-2
  2. anthropic.com/news/claude-2-1
  3. platform.claude.com/docs/en/about-claude/model-deprecations

References

  1. Claude 2 · Anthropic · official
  2. Introducing Claude 2.1 · Anthropic · official
  3. Model deprecations - Claude Platform Docs · Anthropic · official
  4. Commitments on model deprecation and preservation · Anthropic · official

Evidence: Life events officially confirmed; Temperament community consensus . Every life event links to an official source — click "Source" on the timeline to verify. Spotted a mistake? Tell us

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