# claude-3-sonnet-20240229

Calls to the model claude-3-sonnet-20240229 on Anthropic stopped working on July 21, 2025.

- API: Anthropic (api.anthropic.com)
- Model: claude-3-sonnet-20240229
- Kind: Model retirement
- Takes effect: July 21, 2025
- Calls after that day: fail
- Calls it hits: `model claude-3-sonnet-20240229`
- Source: [Deprecations page](https://platform.claude.com/docs/en/about-claude/model-deprecations)
- Page: https://www.okapi.bot/models/anthropic/claude-3-sonnet-20240229/

## What to use instead

Move to claude-sonnet-5-5, recommended by Anthropic.