Epoch Capabilities Index (ECI) ↗133.43 ECI
Claude 3.5 Sonnet (October 2024) · General ECI · 26 October 2026 fit ↗
Anthropic / MODEL EVIDENCE
Claude 3.5 Sonnet (October 2024)
3 benchmarks · 3 observations · 3 sources · released 2024-10-22
Scores at a glance
3 benchmarks · large dot: Claude 3.5 Sonnet (October 2024); small dots: closest models where reported
Claude 3.5 Sonnet (October 2024) · Scale Labs · Score ↗
VISTA ↗38.72%
Claude 3.5 Sonnet (October 2024) · Scale Labs · Score ↗
Closest models by score
Similar positions on shared benchmark leaderboards. Smaller gaps are closer.
kimi-k2.5 →Kimi
2 of 2 shared benchmark comparisons
Claude 3.7 Sonnet (February 2025) →Anthropic
2 of 2 shared benchmark comparisons
GPT-5.1-instant →OpenAI
2 of 2 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.
- AI benchmarks & capabilities ↗
- Scale Labs — evaluation methodology and results ↗
- Scale Labs — evaluation methodology and results ↗
Names used in source tables
Claude 3.5 Sonnet (October 2024)