20 August 2026
Anthropic built a stronger Claude model that stays internal only
First reported
The Decoder ran this on .
- Anthropic, the company behind Claude, developed an unreleased model called Model 2 that outperforms all public versions of Claude, according to its August 2026 risk report.
- Model 2 scores 1.5 points higher than Claude Mythos 5 on Anthropic's internal capability scale, a smaller gain than previous public releases showed between versions.
Reported by The Decoder