# Claude Sonnet 4 — Deprecated — shutdown October 9, 2026

For Claude Sonnet 4, provider is Databricks; lifecycle status is Deprecated; shutdown / retirement date is October 9, 2026; recommended replacement is Claude Sonnet 4.6; platform / deployment scope is Databricks Foundation Model APIs — pay-per-token, recorded from its source on 2026-09-15.

- **Provider:** Databricks _(our reading, not quoted from the source)_
- **Model ID / API name:** Claude Sonnet 4 _(verified: appears in the quote below)_
- **Human-readable model name:** Anthropic Claude Sonnet 4 _(verified: appears in the quote below)_
- **Lifecycle status:** Deprecated
- **Shutdown / retirement date:** October 9, 2026 _(verified: appears in the quote below)_
- **Recommended replacement:** Claude Sonnet 4.6 _(verified: appears in the quote below)_
- **Platform / deployment scope:** Databricks Foundation Model APIs — pay-per-token _(our reading, not quoted from the source)_

## What the source says

> Anthropic Claude Sonnet 4 | Pay-per-token: October 9, 2026 | Claude Sonnet 4.6 |

## Source

- https://learn.microsoft.com/en-us/azure/databricks/machine-learning/retired-models-policy

Last verified: 2026-09-15. Review by: 2026-10-15.
Part of [AI model deprecation and retirement dates by provider](https://referencesource.org/ai-model-deprecation-and-retirement/).