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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

SimpleBench

SimpleBench

Rank #26 of 51 · 64 models scored · top score 78.28

AINTEGRITY 86 / 100

unknown

Strongest on discrimination, weakest on contamination resistance. Caveat: the public test set leaves contamination on the table.

consistent harnesspublic test set

Headroom to ceiling

21.7 headroomtop 78.3ceiling 100

Score distribution

median 34.6Claude Fable 5 78.304182

State of the art over time

0418278.320242026

Integrity breakdown

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

Discrimination30%100

Does it still separate models?

Saturation headroom30%99

How far from ceiling / clustered at the top?

Contamination resistance15%19

Public vs held-out; training-leak risk.

Harness comparability15%100

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

Freshness10%86

How old is the benchmark?

Leaderboard

#ModelScoreEvidenceMeasured
1Claude Fable 578.28unverified2026-06-09
2Gemini 3.1 Pro75.52unverified2026-02-19
3GPT-5.5 Pro72.28unverified2026-04-23
4Gemini 3.5 Flash72.04unverified2026-05-19
5Gemini 3 Pro71.68unverified2025-11-18
6GPT-5.4 Pro68.92unverified2026-03-05
7Qwen3.7-Max64.48unverified2026-05-19
8GPT-5.562.8unverified2026-04-23
9Claude Opus 4.661.12unverified2026-02-05
10Claude Opus 4.857.76unverified2026-05-28
11Qwen 3.6 Max (Preview)55.6unverified2026-04-20
12Claude Opus 4.755.48unverified2026-04-16
13Gemini 2.5 Pro (Jun 2025)54.88unverified2025-06-05
14Claude Opus 4.554.4unverified2025-11-24
15GPT-5 Pro53.92unverified2025-10-07
16DeepSeek-V4-Pro53.44unverified2026-04-24
17Gemini 3 Flash53.32unverified2025-12-17
18Grok 452.6unverified2025-07-09
19Claude Opus 4.152unverified2025-08-05
20Claude Opus 450.56unverified2025-05-22
21GLM-5.150.44unverified2026-04-07
22GPT-5.2 Pro48.88unverified2025-12-11
23GPT-548.04unverified2025-08-07
24Claude Sonnet 4.545.16unverified2025-09-29
25GLM-543.84unverified2026-02-11
26GPT-5.143.84unverified2025-11-13
27o343.72unverified2024-12-20
28Gemini 2.5 Pro (Mar 2025)41.92unverified2025-03-25
29GLM-4.737.24unverified2025-12-22
30Kimi K2.536.16unverified2026-02-02
31Claude 3.7 Sonnet35.68unverified2025-02-24
32GPT-5.234.96unverified2025-12-11
33Claude Sonnet 434.6unverified2025-05-22
34o1-preview30.04unverified2024-09-12
35Claude 3.5 Sonnet (October 2024)29.68unverified2024-10-22
36Gemini 2.5 Flash (Jun 2025)29.44unverified2025-06-17
37DeepSeek-R1 (May 2025)28.96unverified2025-05-28
38o128.12unverified2024-12-05
39DeepSeek-V3.128unverified2025-08-21
40o4-mini26.44unverified2025-04-16
41Grok 323.32unverified2025-02-17
42GPT-4.521.4unverified2025-02-27
43Gemini 2.0 Flash (Dec 2024)17.32unverified2024-12-11
44Qwen3-235B-A22B17.2unverified2025-04-28
45DeepSeek-R117.08unverified2025-01-20
46Gemini 2.0 Flash Thinking (Jan 2025)16.84unverified2025-01-21
47Llama 4 Maverick13.24unverified2025-04-05
48Claude 3.5 Sonnet13unverified2024-06-20
49DeepSeek-V3 (Mar 2025)12.64unverified2025-03-24
50Gemini 1.5 Pro (Sept 2024)12.52unverified2024-09-24
51GPT-4.112.4unverified2025-04-14
52Kimi K2 (Jul 2025)11.56unverified2025-07-11
53GPT-4 Turbo (Apr 2024)10.12unverified2024-04-09
54Claude 3 Opus8.2unverified2024-03-04
55Llama 3.1-405B7.6unverified2024-07-23
56o3-mini7.36unverified2025-01-31
57Grok-2 (Dec 2024)7.24unverified2024-08-13
58Mistral Large 2 (Jul 2024)7unverified2024-07-24
59gpt-oss-120b6.52unverified2025-08-05
60Llama 3.3 70B3.88unverified2024-12-06
61DeepSeek-V32.68unverified2024-12-24
62o1-mini1.72unverified2024-09-12
63GPT-4o (Aug 2024)1.36unverified2024-05-13
64GPT-4o mini0unverified2024-07-18

At a glance

Models scored
64
Top model
Claude Fable 5
Top score
78.28
Score spread
78.28
Headroom
21.72

Benchmark context

Task type
unknown
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
2024-10-31
License
CC BY 4.0
Source
epoch.ai/data/eci_benchmarks.csv

Provenance

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

Follow the record

Integrity neighbors

  • Aider polyglotA · 87
  • Fiction.LiveBenchA · 87
  • VPCTA · 87
  • Terminal BenchB · 84
  • SWE-Bench verifiedB · 83
  • CL-benchB · 82

Top models here

  • Claude Fable 578.28
  • Gemini 3.1 Pro75.52
  • GPT-5.5 Pro72.28
  • Gemini 3.5 Flash72.04
  • Gemini 3 Pro71.68

Head-to-head

  • Claude Fable 5 vs Gemini 3.1 Pro
  • Claude Fable 5 vs GPT-5.5 Pro
  • Gemini 3.1 Pro vs GPT-5.5 Pro