# claude-2.1

Calls to the model claude-2.1 on Anthropic stopped working on July 21, 2025.

- API: Anthropic (api.anthropic.com)
- Model: claude-2.1
- Kind: Model retirement
- Takes effect: July 21, 2025
- Calls after that day: fail
- Calls it hits: `model claude-2.1`
- Source: [Deprecations page](https://platform.claude.com/docs/en/about-claude/model-deprecations)
- Page: https://www.okapi.bot/models/anthropic/claude-2.1/

## What to use instead

Move to claude-opus-4-8, recommended by Anthropic.