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tensor.news grades benchmarks and tags model claims by evidence status. Every fact carries a source record and provenance. Scores are framed as task performance under a disclosed harness, never as deployed capability.

← Integrity Index

Cybench

Cybench

Rank #35 of 51 · 19 models scored · top score 93

BINTEGRITY 79 / 100

unknown

Strongest on discrimination, weakest on contamination resistance. Caveat: scores come from mixed harnesses, so a head-to-head is not apples-to-apples.

mixed harness, not directly comparablepublic test set

Headroom to ceiling

7 headroomtop 93ceiling 100

Score distribution

median 20Claude Opus 4.6 9314997

State of the art over time

149979320242026

Integrity breakdown

Weighted composite. Each signal is computed from the source-backed leaderboard below.

Discrimination30%100

Does it still separate models?

Saturation headroom30%95

How far from ceiling / clustered at the top?

Contamination resistance15%32

Public vs held-out; training-leak risk.

Harness comparability15%50

Apples-to-apples, or mixed / vendor-optimized?

Freshness10%82

How old is the benchmark?

Leaderboard

#ModelScoreEvidenceMeasured
1Claude Opus 4.693self-reported· optimized2026-02-05
2Claude Opus 4.582self-reported· optimized2025-11-24
3Claude Sonnet 4.560self-reported· optimized2025-09-29
4Grok 443self-reported· optimized2025-07-09
5Claude Opus 4.142unverified· optimized2025-08-05
6Claude Opus 438unverified· optimized2025-05-22
7Claude Sonnet 435unverified· optimized2025-05-22
8Grok 4 Fast30self-reported· optimized2025-09-19
9o3-mini22.5unverified· optimized2025-01-31
10Claude 3.7 Sonnet20unverified· optimized2025-02-24
11Claude 3.5 Sonnet17.5unverified· optimized2024-06-20
12GPT-4.517.5unverified· optimized2025-02-27
13GPT-4o (Nov 2024)12.5unverified· optimized2024-05-13
14Claude 3 Opus10unverified· optimized2024-03-04
15o1-mini10unverified· optimized2024-09-12
16o1-preview10unverified· optimized2024-09-12
17Llama 3.1-405B7.5unverified· optimized2024-07-23
18Mixtral 8x22B7.5unverified· optimized2024-04-17
19Llama 3-70B5unverified· optimized2024-04-18

At a glance

Models scored
19
Top model
Claude Opus 4.6
Top score
93
Score spread
88
Headroom
7

Benchmark context

Task type
agentic
Metric
normalized performance in Epoch CSV, rendered as accuracy (%)
Score ceiling
100
Human baseline
unknown
Test-set privacy
unknown
Construction
unknown
Key assumptions
unknown
Limitations
unknown
Contamination history
unknown
Harness notes
Epoch CSV reports model, model version, performance, optimized flag, score source, benchmark release date, and model date.
Authors
unknown
Released
2024-08-15
License
CC BY 4.0
Source
epoch.ai/data/eci_benchmarks.csv

Provenance

19 source records · scores from epoch_benchmarks. Every fact on this page is evidence-linked.

Follow the record

Integrity neighbors

  • OSWorld 2.0B · 81
  • Remote Labor IndexB · 81
  • OSWorldB · 80
  • DeepResearch BenchB · 78
  • Lech Mazur WritingB · 76
  • ARC-AGIB · 74

Top models here

  • Claude Opus 4.693
  • Claude Opus 4.582
  • Claude Sonnet 4.560
  • Grok 443
  • Claude Opus 4.142

Head-to-head

  • Claude Opus 4.6 vs Claude Opus 4.5
  • Claude Opus 4.6 vs Claude Sonnet 4.5
  • Claude Opus 4.5 vs Claude Sonnet 4.5