AsOf

model family · lineage

Latest Claude model: Claude Haiku 5.5

As of November 4, 2026, the latest Claude model on the AsOf record is Claude Haiku 5.5, released on October 7, 2026 by Anthropic, from a primary source (support.claude.com). The newest in each other line: Claude Sonnet 5.5 (September 28, 2026), Claude Opus 5.5 (September 22, 2026), Claude Mythos 5.1 (September 1, 2026), Claude Fable 5.1 (September 1, 2026), Claude 2.1 (November 21, 2023) and Claude Instant 1.2 (August 9, 2023). The record holds 32 Claude models, 32 with a checked release date.

latest model
Claude Haiku 5.5October 7, 2026 · support.claude.com · as of 2026-11-04

Haiku

4 models · oldest first
  1. Claude 3 Haikureleased 2024-03-13 · deprecated 2026-02-19 · retired 2026-04-20

    API ids: claude-3-haiku-20240307

  2. Claude 3.5 Haikureleased 2024-11-04 · deprecated 2025-12-19 · retired 2026-02-19

    replaced by Claude Haiku 4.5

    API ids: claude-3-5-haiku-20241022

  3. Claude Haiku 4.5released 2025-10-15

    replaced Claude 3.5 Haiku

    API ids: claude-haiku-4-5-20251001, claude-haiku-4-5

  4. Claude Haiku 5.5latestreleased 2026-10-07

    API ids: claude-haiku-5-5

Sonnet

9 models · oldest first
  1. Claude 3 Sonnetreleased 2024-03-04 · deprecated 2025-01-21 · retired 2025-07-21

    API ids: claude-3-sonnet-20240229

  2. Claude 3.5 Sonnetreleased 2024-06-20 · deprecated 2025-08-13 · retired 2025-10-28

    replaced by Claude 3.5 Sonnet (upgraded)

    API ids: claude-3-5-sonnet-20240620

  3. Claude 3.5 Sonnet (upgraded)released 2024-10-22 · deprecated 2025-08-13 · retired 2025-10-28

    replaced Claude 3.5 Sonnet

    API ids: claude-3-5-sonnet-20241022

  4. Claude 3.7 Sonnetreleased 2025-02-24 · deprecated 2025-10-28 · retired 2026-02-19

    replaced by Claude Sonnet 4

    API ids: claude-3-7-sonnet-20250219

  5. Claude Sonnet 4released 2025-05-22 · deprecated 2026-04-14 · retired 2026-06-15

    replaced Claude 3.7 Sonnet

    API ids: claude-sonnet-4-20250514

  6. Claude Sonnet 4.5released 2025-09-29 · deprecated 2026-09-30

    replaced by Claude Sonnet 4.6

    API ids: claude-sonnet-4-5-20250929, claude-sonnet-4-5

  7. Claude Sonnet 4.6released 2026-02-17

    replaced Claude Sonnet 4.5 · replaced by Claude Sonnet 5

    API ids: claude-sonnet-4-6

  8. Claude Sonnet 5released 2026-06-30

    replaced Claude Sonnet 4.6 · replaced by Claude Sonnet 5.5

    API ids: claude-sonnet-5

  9. Claude Sonnet 5.5released 2026-09-28

    replaced Claude Sonnet 5

    API ids: claude-sonnet-5-5

Opus

9 models · oldest first
  1. Claude 3 Opusreleased 2024-03-04 · deprecated 2025-06-30 · retired 2026-01-05

    API ids: claude-3-opus-20240229

  2. Claude Opus 4released 2025-05-22 · deprecated 2026-04-14 · retired 2026-06-15

    replaced by Claude Opus 4.1

    API ids: claude-opus-4-20250514

  3. Claude Opus 4.1released 2025-08-05 · deprecated 2026-06-05 · retired 2026-08-05

    replaced Claude Opus 4

    API ids: claude-opus-4-1-20250805

  4. Claude Opus 4.5released 2025-11-24

    replaced by Claude Opus 4.6

    API ids: claude-opus-4-5-20251101, claude-opus-4-5

  5. Claude Opus 4.6released 2026-02-05

    replaced Claude Opus 4.5 · replaced by Claude Opus 4.7

    API ids: claude-opus-4-6

  6. Claude Opus 4.7released 2026-04-16

    replaced Claude Opus 4.6 · replaced by Claude Opus 4.8

    API ids: claude-opus-4-7

  7. Claude Opus 4.8released 2026-05-28

    replaced Claude Opus 4.7 · replaced by Claude Opus 5

    API ids: claude-opus-4-8

  8. Claude Opus 5released 2026-07-24

    replaced Claude Opus 4.8

    API ids: claude-opus-5

  9. Claude Opus 5.5released 2026-09-22

    API ids: claude-opus-5-5

Mythos

3 models · oldest first
  1. Claude Mythos Previewreleased 2026-04-07 · deprecated 2026-06-09

    replaced by Claude Mythos 5

  2. Claude Mythos 5released 2026-06-09

    replaced Claude Mythos Preview

    API ids: claude-mythos-5

  3. Claude Mythos 5.1released 2026-09-01

    API ids: claude-mythos-5-1

Fable

2 models · oldest first
  1. Claude Fable 5released 2026-06-09

    replaced by Claude Fable 5.1

    API ids: claude-fable-5

  2. Claude Fable 5.1released 2026-09-01

    replaced Claude Fable 5

    API ids: claude-fable-5-1

Claude

3 models · oldest first
  1. Claude 1released 2023-03-14 · deprecated 2024-09-04 · retired 2024-11-06

    API ids: claude-1.0, claude-1.1, claude-1.2, claude-1.3

  2. Claude 2released 2023-07-11 · deprecated 2025-01-21 · retired 2025-07-21

    replaced by Claude 2.1

    API ids: claude-2.0

  3. Claude 2.1released 2023-11-21 · deprecated 2025-01-21 · retired 2025-07-21

    replaced Claude 2

    API ids: claude-2.1

Instant

2 models · oldest first
  1. Claude Instantreleased 2023-03-14 · deprecated 2024-09-04 · retired 2024-11-06

    API ids: claude-instant-1.0, claude-instant-1.1

  2. Claude Instant 1.2released 2023-08-09 · deprecated 2024-09-04 · retired 2024-11-06

    API ids: claude-instant-1.2

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