# Claude Sonnet 4.5's dated ID shuts down Nov 30. Dated IDs or aliases?

Source: [DEV Community: ai](https://dev.to/getversyka/claude-sonnet-45s-dated-id-shuts-down-nov-30-dated-ids-or-aliases-5h70) · 2026-11-13 · AI
Page: https://themorning.dev/story/claude-sonnet-4-5-s-dated-id-shuts-down-nov-30-dated-ids-or-aliases-bf6fda0bbe9c630d
Kind: other · Impact: medium

## In brief

- The dated snapshot claude-sonnet-4-5-20250929 of Claude Sonnet 4.5 shuts down on November 30, 2026.
- The source contrasts dated snapshot IDs with aliases such as claude-sonnet-4-5, which point at whatever model the vendor currently serves under that name.

## Why it matters

Code or configs that pin the dated model ID will stop working after the shutdown date, so affected applications need to switch to a different model identifier before then.

## What to do

- Move any requests using claude-sonnet-4-5-20250929 to another model identifier before November 30, 2026

## Versions

- Claude Sonnet 4.5

## Timeline

- 2026-11-30: Dated snapshot claude-sonnet-4-5-20250929 shuts down

## Coverage

- [Claude Sonnet 4.5's dated ID shuts down Nov 30. Dated IDs or aliases?](https://dev.to/getversyka/claude-sonnet-45s-dated-id-shuts-down-nov-30-dated-ids-or-aliases-5h70) — DEV Community: ai, 2026-11-13

Tags: ai, llm, claude, api, deprecation, model-versioning

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Brief generated by AI (claude-haiku-5-5) from the reporting listed under Coverage. Headlines belong to their publishers. The Morning Dev – https://themorning.dev