Page history · api

model-deprecationsabout-claude/model-deprecations

Every read this site has made of the page, newest first. A date is when upstream edited the page, where upstream publishes that, and otherwise when the poller caught the edit; each row says which of the two it is.

Recorded changes14including the first read

Lines now233in the newest capture

Characters14,367in the newest capture

First seen 14 Aug 2026 04:31 UTC

Last changed 21 Oct 2026 19:37 UTC

Every recorded edit

14 edits since this site first read it

WhenTitle it carriedWhatLines

As it stands

Lines233
Characters14,367
Categoryabout-claude
Pathabout-claude/model-deprecations

Read it upstream →

Sections it gained

### 2026-09-30: Claude Sonnet 4.5 model
## Overview
## Migrating to replacements
## Notifications
## Auditing model usage
## Best practices
## Deprecation downsides and mitigations
## Model status
## Deprecation history
### 2026-06-05: Claude Opus 4.1 model
### 2026-04-14: Claude Sonnet 4 and Claude Opus 4 models
### 2026-02-19: Claude Haiku 3 model