# Claude Opus 4

Claude Opus 4 is a model from Anthropic, first recorded on 27 Sep 2026; its release date is not established.

- Developer: Anthropic
- Id: anthropic/claude-opus-4
- Sighting: 2026-09-27T20:12:36.085Z
  - [evidence link](https://opencode.ai/data/anthropic/claude-opus-4-0)
- Status: Sighting
- Canonical: https://alexgetman.com/models/anthropic/claude-opus-4-443/

## Questions

### When was Claude Opus 4 released?

Its release date is not established. Signal Forge first recorded it on 27 Sep 2026.

## Evidence links

- [models.dev · catalogue](https://models.dev/#claude-opus-4)
- [discovery:opencode-data](https://opencode.ai/data/anthropic/claude-opus-4-0)
- [OpenRouter](https://openrouter.ai/anthropic/claude-opus-4)
- [anthropic-pricing](https://platform.claude.com/docs/en/about-claude/pricing)
- [Vercel AI Gateway](https://vercel.com/ai-gateway)
- [review](https://www.anthropic.com/news/claude-4)

## Signals

- [Claude Opus 4: Source entry removed](https://alexgetman.com/signals/2026/09/21/claude-opus-4-retired-except-on-claude-models-on-google-cloud-google-managed/)