# claude-1.0

Calls to the model claude-1.0 on Anthropic stopped working on November 6, 2024.

## The error Anthropic returns once claude-1.0 is gone

HTTP 404

```json
{"type":"error","error":{"type":"not_found_error","message":"model: claude-1.0"}}
```

## What to use instead

Move to claude-haiku-4-5-20251001, recommended by Anthropic.

- API: Anthropic (api.anthropic.com)
- Model: claude-1.0
- Kind: Model retirement
- Takes effect: November 6, 2024
- Calls after that day: fail
- Calls it hits: `model claude-1.0`
- 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-1.0/

## Anthropic's words

> Retirement date: November 6, 2024; Deprecated model: claude-1.0; Recommended replacement: claude-haiku-4-5-20251001

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