# Anthropic timeline: models

entity: /record/anthropic.md  
full timeline: /timelines/anthropic.md  

Model releases, deprecations, retirements, predecessors and default changes, oldest first. A model's row is on the model's own record.


## 2023

- 2023-03-14 | model_release | [Claude 1](/record/claude-1.md) | Claude | valid | [clm_A00957588358](/claim/clm_A00957588358.md)
- 2023-03-14 | model_release | [Claude Instant](/record/claude-instant.md) | Claude Instant | valid | [clm_573BC5D07370](/claim/clm_573BC5D07370.md)
- 2023-07-11 | model_release | [Claude 2](/record/claude-2.md) | Claude 2 | valid | [clm_BDD05838BB85](/claim/clm_BDD05838BB85.md)
- 2023-08-09 | model_release | [Claude Instant 1.2](/record/claude-instant-1-2.md) | Claude Instant 1.2 | valid | [clm_06FB6F238F58](/claim/clm_06FB6F238F58.md)
- 2023-11-21 | model_release | [Claude 2.1](/record/claude-2-1.md) | Claude 2.1 | valid | [clm_9B3815438148](/claim/clm_9B3815438148.md)

## 2024

- 2024-03-04 | model_release | [Claude 3 Opus](/record/claude-3-opus.md) | Claude 3 Opus | valid | [clm_2CB39CC4620B](/claim/clm_2CB39CC4620B.md)
- 2024-03-04 | model_release | [Claude 3 Sonnet](/record/claude-3-sonnet.md) | Claude 3 Sonnet | valid | [clm_66B808BFEDD0](/claim/clm_66B808BFEDD0.md)
- 2024-03-13 | model_release | [Claude 3 Haiku](/record/claude-3-haiku.md) | Claude 3 Haiku | valid | [clm_60C2CD971E74](/claim/clm_60C2CD971E74.md)
- 2024-06-20 | model_release | [Claude 3.5 Sonnet](/record/claude-3-5-sonnet.md) | Claude Sonnet 3.5 | valid | [clm_E18E5EA540B6](/claim/clm_E18E5EA540B6.md)
- 2024-09-04 | deprecated | [Claude 1](/record/claude-1.md) | claude-1.3 | valid | [clm_FA2834065240](/claim/clm_FA2834065240.md)
- 2024-09-04 | deprecated | [Claude Instant](/record/claude-instant.md) | claude-instant-1.1 | valid | [clm_A298077399F4](/claim/clm_A298077399F4.md)
- 2024-09-04 | deprecated | [Claude Instant 1.2](/record/claude-instant-1-2.md) | claude-instant-1.2 | valid | [clm_326EC87B9755](/claim/clm_326EC87B9755.md)
- 2024-10-22 | model_release | [Claude 3.5 Sonnet (upgraded)](/record/claude-3-5-sonnet-v2.md) | Claude 3.5 Sonnet | valid | [clm_F9D25107849E](/claim/clm_F9D25107849E.md)
- 2024-11-04 | model_release | [Claude 3.5 Haiku](/record/claude-3-5-haiku.md) | Claude Haiku 3.5 | valid | [clm_9E84F4DF9819](/claim/clm_9E84F4DF9819.md)
- 2024-11-06 | retired | [Claude 1](/record/claude-1.md) | claude-1.3 | valid | [clm_012A78F2AC68](/claim/clm_012A78F2AC68.md)
- 2024-11-06 | retired | [Claude Instant](/record/claude-instant.md) | claude-instant-1.1 | valid | [clm_DD8DC68FB452](/claim/clm_DD8DC68FB452.md)
- 2024-11-06 | retired | [Claude Instant 1.2](/record/claude-instant-1-2.md) | claude-instant-1.2 | valid | [clm_AA6271CB9FB8](/claim/clm_AA6271CB9FB8.md)

## 2025

- 2025-01-21 | deprecated | [Claude 2](/record/claude-2.md) | claude-2.0 | valid | [clm_375E68384ECF](/claim/clm_375E68384ECF.md)
- 2025-01-21 | deprecated | [Claude 2.1](/record/claude-2-1.md) | claude-2.1 | valid | [clm_353889F4D96F](/claim/clm_353889F4D96F.md)
- 2025-01-21 | deprecated | [Claude 3 Sonnet](/record/claude-3-sonnet.md) | claude-3-sonnet-20240229 | valid | [clm_4AC49512C3A3](/claim/clm_4AC49512C3A3.md)
- 2025-02-24 | model_release | [Claude 3.7 Sonnet](/record/claude-3-7-sonnet.md) | Claude Sonnet 3.7 | valid | [clm_B6E6CC317320](/claim/clm_B6E6CC317320.md)
- 2025-05-22 | model_release | [Claude Opus 4](/record/claude-opus-4.md) | Claude Opus 4 | valid | [clm_0ED874A85CE1](/claim/clm_0ED874A85CE1.md)
- 2025-05-22 | model_release | [Claude Sonnet 4](/record/claude-sonnet-4.md) | Claude Sonnet 4 | valid | [clm_37A3AD4B36BA](/claim/clm_37A3AD4B36BA.md)
- 2025-06-30 | deprecated | [Claude 3 Opus](/record/claude-3-opus.md) | claude-3-opus-20240229 | valid | [clm_08C2E8EF4569](/claim/clm_08C2E8EF4569.md)
- 2025-07-21 | retired | [Claude 2](/record/claude-2.md) | claude-2.0 | valid | [clm_0B7F94BB5045](/claim/clm_0B7F94BB5045.md)
- 2025-07-21 | retired | [Claude 2.1](/record/claude-2-1.md) | claude-2.1 | valid | [clm_88032FA366AC](/claim/clm_88032FA366AC.md)
- 2025-07-21 | retired | [Claude 3 Sonnet](/record/claude-3-sonnet.md) | claude-3-sonnet-20240229 | valid | [clm_7A0BF69A4663](/claim/clm_7A0BF69A4663.md)
- 2025-08-05 | model_release | [Claude Opus 4.1](/record/claude-opus-4-1.md) | Claude Opus 4.1 | valid | [clm_234B67F53ADD](/claim/clm_234B67F53ADD.md)
- 2025-08-13 | deprecated | [Claude 3.5 Sonnet](/record/claude-3-5-sonnet.md) | claude-3-5-sonnet-20240620 | valid | [clm_BE2D5D217F5B](/claim/clm_BE2D5D217F5B.md)
- 2025-08-13 | deprecated | [Claude 3.5 Sonnet (upgraded)](/record/claude-3-5-sonnet-v2.md) | claude-3-5-sonnet-20241022 | valid | [clm_F45BFAC073D7](/claim/clm_F45BFAC073D7.md)
- 2025-09-29 | model_release | [Claude Sonnet 4.5](/record/claude-sonnet-4-5.md) | Claude Sonnet 4.5 | valid | [clm_5B3CB4F2F885](/claim/clm_5B3CB4F2F885.md)
- 2025-09-29 | model_release | [Claude Sonnet 4.5](/record/claude-sonnet-4-5.md) | Sonnet 4.5 | valid | [clm_D58BE2DA9452](/claim/clm_D58BE2DA9452.md)
- 2025-10-15 | model_release | [Claude Haiku 4.5](/record/claude-haiku-4-5.md) | Claude Haiku 4.5 | valid | [clm_4A68D5E26B3E](/claim/clm_4A68D5E26B3E.md)
- 2025-10-28 | deprecated | [Claude 3.7 Sonnet](/record/claude-3-7-sonnet.md) | claude-3-7-sonnet-20250219 | valid | [clm_6B9722B43184](/claim/clm_6B9722B43184.md)
- 2025-10-28 | retired | [Claude 3.5 Sonnet](/record/claude-3-5-sonnet.md) | claude-3-5-sonnet-20240620 | valid | [clm_85334C363E3E](/claim/clm_85334C363E3E.md)
- 2025-10-28 | retired | [Claude 3.5 Sonnet (upgraded)](/record/claude-3-5-sonnet-v2.md) | claude-3-5-sonnet-20241022 | valid | [clm_C87AFD034D45](/claim/clm_C87AFD034D45.md)
- 2025-11-24 | model_release | [Claude Opus 4.5](/record/claude-opus-4-5.md) | Claude Opus 4.5 | valid | [clm_6F325921D6D0](/claim/clm_6F325921D6D0.md)
- 2025-12-19 | deprecated | [Claude 3.5 Haiku](/record/claude-3-5-haiku.md) | claude-3-5-haiku-20241022 | valid | [clm_967C6FF2D705](/claim/clm_967C6FF2D705.md)

## 2026

- 2026-01-05 | retired | [Claude 3 Opus](/record/claude-3-opus.md) | claude-3-opus-20240229 | valid | [clm_DB3E1BAE0435](/claim/clm_DB3E1BAE0435.md)
- 2026-02-05 | model_release | [Claude Opus 4.6](/record/claude-opus-4-6.md) | Claude Opus 4.6 | valid | [clm_4AA221BF5363](/claim/clm_4AA221BF5363.md)
- 2026-02-17 | model_release | [Claude Sonnet 4.6](/record/claude-sonnet-4-6.md) | Claude Sonnet 4.6 | valid | [clm_9E78052E1A8A](/claim/clm_9E78052E1A8A.md)
- 2026-02-19 | deprecated | [Claude 3 Haiku](/record/claude-3-haiku.md) | claude-3-haiku-20240307 | valid | [clm_C1EB0778A4B7](/claim/clm_C1EB0778A4B7.md)
- 2026-02-19 | retired | [Claude 3.5 Haiku](/record/claude-3-5-haiku.md) | claude-3-5-haiku-20241022 | valid | [clm_CECDC179AAEA](/claim/clm_CECDC179AAEA.md)
- 2026-02-19 | retired | [Claude 3.7 Sonnet](/record/claude-3-7-sonnet.md) | claude-3-7-sonnet-20250219 | valid | [clm_35AEF88488BD](/claim/clm_35AEF88488BD.md)
- 2026-04-07 | model_release | [Claude Mythos Preview](/record/claude-mythos-preview.md) | Claude Mythos Preview | valid | [clm_8FBB9EF60E7B](/claim/clm_8FBB9EF60E7B.md)
- 2026-04-14 | deprecated | [Claude Opus 4](/record/claude-opus-4.md) | claude-opus-4-20250514 | valid | [clm_A8CB4256B5E1](/claim/clm_A8CB4256B5E1.md)
- 2026-04-14 | deprecated | [Claude Sonnet 4](/record/claude-sonnet-4.md) | claude-sonnet-4-20250514 | valid | [clm_8120237C129C](/claim/clm_8120237C129C.md)
- 2026-04-16 | model_release | [Claude Opus 4.7](/record/claude-opus-4-7.md) | Claude Opus 4.7 | valid | [clm_696F427D8B7B](/claim/clm_696F427D8B7B.md)
- 2026-04-20 | retired | [Claude 3 Haiku](/record/claude-3-haiku.md) | claude-3-haiku-20240307 | valid | [clm_239B39849A38](/claim/clm_239B39849A38.md)
- 2026-05-28 | deprecated | [Claude Opus 4.6](/record/claude-opus-4-6.md) | fast mode | valid | [clm_7AC3B47F24F1](/claim/clm_7AC3B47F24F1.md)
- 2026-05-28 | model_release | [Claude Opus 4.8](/record/claude-opus-4-8.md) | Claude Opus 4.8 | valid | [clm_8BE1B4110AE7](/claim/clm_8BE1B4110AE7.md)
- 2026-06-05 | deprecated | [Claude Opus 4.1](/record/claude-opus-4-1.md) | claude-opus-4-1-20250805 | valid | [clm_C4A9E812D526](/claim/clm_C4A9E812D526.md)
- 2026-06-09 | deprecated | [Claude Mythos Preview](/record/claude-mythos-preview.md) | claude-mythos-preview | valid | [clm_C2876AD1EB33](/claim/clm_C2876AD1EB33.md)
- 2026-06-09 | model_release | [Claude Fable 5](/record/claude-fable-5.md) | Claude Fable 5 | valid | [clm_63FF7EBBE2C1](/claim/clm_63FF7EBBE2C1.md)
- 2026-06-09 | model_release | [Claude Mythos 5](/record/claude-mythos-5.md) | Claude Mythos 5 | valid | [clm_33323473D00B](/claim/clm_33323473D00B.md)
- 2026-06-15 | retired | [Claude Opus 4](/record/claude-opus-4.md) | claude-opus-4-20250514 | valid | [clm_57DF26F2BB05](/claim/clm_57DF26F2BB05.md)
- 2026-06-15 | retired | [Claude Sonnet 4](/record/claude-sonnet-4.md) | claude-sonnet-4-20250514 | valid | [clm_A77C1EA3626C](/claim/clm_A77C1EA3626C.md)
- 2026-06-30 | model_release | [Claude Sonnet 5](/record/claude-sonnet-5.md) | Claude Sonnet 5 | valid | [clm_46CF4433C757](/claim/clm_46CF4433C757.md)
- 2026-07-24 | model_release | [Claude Opus 5](/record/claude-opus-5.md) | Claude Opus 5 | valid | [clm_8A1FF48BDD89](/claim/clm_8A1FF48BDD89.md)
- 2026-08-05 | retired | [Claude Opus 4.1](/record/claude-opus-4-1.md) | Claude Opus 4.1 | valid | [clm_C828CD007200](/claim/clm_C828CD007200.md)
- 2026-08-05 | retired | [Claude Opus 4.1](/record/claude-opus-4-1.md) | claude-opus-4-1-20250805 | valid | [clm_D5B285E2BC53](/claim/clm_D5B285E2BC53.md)
- 2026-09-01 | model_release | [Claude Fable 5.1](/record/claude-fable-5-1.md) | Claude Fable 5.1 | valid | [clm_B087F24135EA](/claim/clm_B087F24135EA.md)
- 2026-09-01 | model_release | [Claude Mythos 5.1](/record/claude-mythos-5-1.md) | Claude Mythos 5.1 | valid | [clm_7B89C517BB64](/claim/clm_7B89C517BB64.md)
- 2026-09-22 | model_release | [Claude Opus 5.5](/record/claude-opus-5-5.md) | Claude Opus 5.5 | valid | [clm_F93B2A65D6D9](/claim/clm_F93B2A65D6D9.md)
- 2026-09-28 | model_release | [Claude Sonnet 5.5](/record/claude-sonnet-5-5.md) | Claude Sonnet 5.5 | valid | [clm_B2E11E4198B9](/claim/clm_B2E11E4198B9.md)
- 2026-09-30 | deprecated | [Claude Sonnet 4.5](/record/claude-sonnet-4-5.md) | claude-sonnet-4-5-20250929 | valid | [clm_CDD27AF61D3F](/claim/clm_CDD27AF61D3F.md)
- 2026-10-07 | model_release | [Claude Haiku 5.5](/record/claude-haiku-5-5.md) | Claude Haiku 5.5 | valid | [clm_884128376B64](/claim/clm_884128376B64.md)