Public KG record
Claude Mythos 5.1
Recorded overview
Same weights as Fable 5.1 but with stricter safeguard layer, restricted access.
An evidence-backed entity from the project knowledge graph; detailed tool metadata is still being added.
Recorded details
- Benchmarks: 60.9% on Terminal-Bench 4.0
- Benchmarks: Terminal-Bench 4.0
- Performance: 60.9% on Terminal-Bench 4.0
Evidence coverage
The KG currently records 8 known information dimensions and has 11 undocumented dimensions, linked to 4 public source articles. These counts describe record coverage, not model performance or verified fit.
Related public records
- Anthropic — develops
- Anthropic — releases
- Claude Fable 5.1 — related to
- Terminal-Bench 4.0 — evaluated on
- Project Glasswing — part of