# claude-fable-5-1 — Active — shutdown Not sooner than September 1, 2027

For claude-fable-5-1, provider is Anthropic; lifecycle status is Active; shutdown / retirement date is Not sooner than September 1, 2027; platform / deployment scope is Anthropic API / Claude Platform on AWS / Microsoft Foundry, recorded from its source on 2026-09-01.

- **Provider:** Anthropic _(our reading, not quoted from the source)_
- **Model ID / API name:** claude-fable-5-1 _(verified: appears in the quote below)_
- **Lifecycle status:** Active _(verified: appears in the quote below)_
- **Shutdown / retirement date:** Not sooner than September 1, 2027 _(verified: appears in the quote below)_
- **Platform / deployment scope:** Anthropic API / Claude Platform on AWS / Microsoft Foundry _(our reading, not quoted from the source)_
- **Human-readable model name:** claude-fable-5-1 _(per raw.githubusercontent.com, not stated by the source above)_

## What the source says

> | claude-fable-5-1           | Active        | N/A               | Not sooner than September 1, 2027  |

## Sources disagree

More than one authority states this, and they do not state the same thing. Both are reproduced with the source each came from.

### Provider

docs.anthropic.com says provider is **Anthropic**, as of 2026-09-01.

> | claude-fable-5-1           | Active        | N/A               | Not sooner than September 1, 2027  |

Source: https://docs.anthropic.com/en/docs/about-claude/model-deprecations.md

raw.githubusercontent.com says provider is **Microsoft Azure / Foundry**, as of 2026-09-09.

> | claude-fable-5-1 | 1 | Preview | 2027-12-05 | — |

Source: https://raw.githubusercontent.com/MicrosoftDocs/azure-ai-docs/main/articles/foundry/openai/includes/concepts-model-retirement-schedule-content.md


### Lifecycle status

docs.anthropic.com says lifecycle status is **Active**, as of 2026-09-01.

> | claude-fable-5-1           | Active        | N/A               | Not sooner than September 1, 2027  |

Source: https://docs.anthropic.com/en/docs/about-claude/model-deprecations.md

raw.githubusercontent.com says lifecycle status is **Preview**, as of 2026-09-09.

> | claude-fable-5-1 | 1 | Preview | 2027-12-05 | — |

Source: https://raw.githubusercontent.com/MicrosoftDocs/azure-ai-docs/main/articles/foundry/openai/includes/concepts-model-retirement-schedule-content.md


### Shutdown / retirement date

docs.anthropic.com says shutdown / retirement date is **Not sooner than September 1, 2027**, as of 2026-09-01.

> | claude-fable-5-1           | Active        | N/A               | Not sooner than September 1, 2027  |

Source: https://docs.anthropic.com/en/docs/about-claude/model-deprecations.md

raw.githubusercontent.com says shutdown / retirement date is **2027-12-05**, as of 2026-09-09.

> | claude-fable-5-1 | 1 | Preview | 2027-12-05 | — |

Source: https://raw.githubusercontent.com/MicrosoftDocs/azure-ai-docs/main/articles/foundry/openai/includes/concepts-model-retirement-schedule-content.md


### Platform / deployment scope

docs.anthropic.com says platform / deployment scope is **Anthropic API / Claude Platform on AWS / Microsoft Foundry**, as of 2026-09-01.

> | claude-fable-5-1           | Active        | N/A               | Not sooner than September 1, 2027  |

Source: https://docs.anthropic.com/en/docs/about-claude/model-deprecations.md

raw.githubusercontent.com says platform / deployment scope is **Azure / Microsoft Foundry**, as of 2026-09-09.

> | claude-fable-5-1 | 1 | Preview | 2027-12-05 | — |

Source: https://raw.githubusercontent.com/MicrosoftDocs/azure-ai-docs/main/articles/foundry/openai/includes/concepts-model-retirement-schedule-content.md


## Source

- https://docs.anthropic.com/en/docs/about-claude/model-deprecations.md
- https://docs.anthropic.com/en/docs/about-claude/model-deprecations
- https://raw.githubusercontent.com/MicrosoftDocs/azure-ai-docs/main/articles/foundry/openai/includes/concepts-model-retirement-schedule-content.md

Last verified: 2026-09-01. Review by: 2026-10-01.
Part of [AI model deprecation and retirement dates by provider](https://referencesource.org/ai-model-deprecation-and-retirement/).