Fortress ↗13.56%
claude-opus-4-5-20251101 · Scale Labs · Risk elicitation score ↗
Anthropic / MODEL EVIDENCE
Claude Opus 4-5-20251101
5 benchmarks · 5 observations · 5 sources
Scores at a glance
5 benchmarks · large dot: Claude Opus 4-5-20251101; small dots: closest models where reported
claude-opus-4-5-20251101 · Scale Labs · Score ↗
TutorBench ↗49.82%
claude-opus-4-5-20251101 · Scale Labs · Score ↗
VISTA ↗45.32%
claude-opus-4-5-20251101 · Scale Labs · Score ↗
ForecastBench ↗64.9 Brier index
claude-opus-4-5-20251101† · Overall difficulty-adjusted Brier index ↗
Closest models by score
Similar positions on shared benchmark leaderboards. Smaller gaps are closer.
Claude Opus 4-1-20250805 →Anthropic
3 of 4 shared benchmark comparisons
Claude Opus 4-1-20250805-thinking →Anthropic
4 of 4 shared benchmark comparisons
Claude Opus 4-5-20251101-thinking →Anthropic
4 of 4 shared benchmark comparisons
How similarity is measured
Mean absolute gap in percentile positions on shared benchmark settings; lower is closer. At least 60% overlap is required, with a minimum of three when available. Independent evaluations are used when there are at least three; otherwise published report comparisons are used. Repeated model observations within one setting are averaged before ranking. Writing-style traits and composite indices are excluded. This describes similarity, not an overall quality ranking.
Sources
Every plotted observation links to its evaluation. Reported configurations, benchmark versions and task subsets can differ; similarity describes shared scores, not training lift.
- Forecastbench — methodology and published results ↗
- Scale Labs — evaluation methodology and results ↗
- Scale Labs — evaluation methodology and results ↗
- Scale Labs — evaluation methodology and results ↗
- Scale Labs — evaluation methodology and results ↗
Names used in source tables
claude-opus-4-5-20251101 · claude-opus-4-5-20251101†