# claude-3-opus-latest

Calls to the model claude-3-opus-latest on Anthropic stopped working on January 5, 2026.

## The error Anthropic returns once claude-3-opus-latest is gone

HTTP 404

```json
{"type":"error","error":{"type":"not_found_error","message":"model: claude-3-opus-latest"}}
```

## What to use instead

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

- API: Anthropic (api.anthropic.com)
- Model: claude-3-opus-latest
- Kind: Model retirement
- Takes effect: January 5, 2026
- Calls after that day: fail
- Calls it hits: `model claude-3-opus-latest`
- Source: [Deprecations page](https://platform.claude.com/docs/en/about-claude/model-deprecations)
- Verified: November 6, 2026, against Anthropic's own pages
- Page: https://www.okapi.bot/models/anthropic/claude-3-opus-latest/

## Anthropic's words

> Retirement date: January 5, 2026; Deprecated model: claude-3-opus-20240229; Recommended replacement: claude-opus-4-8

Okapi finds the calls this change hits in your repo and opens the pull request with the fix: https://github.com/apps/okapi-agent