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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.

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Claude Opus 4.5 vs Claude Sonnet 4.5

Verdict

Claude Opus 4.5 leads 19–0 across 20 shared benchmarks.

Claude Opus 4.5 19 · Claude Sonnet 4.5 0 · 1 tied · higher isn't always better — see caveats.

Per-benchmark head-to-head

Claude Opus 4.5Claude Sonnet 4.5
  • 80
    ARC-AGI
    63.67
  • 37.64
    ARC-AGI-2
    13.61
  • 12
    Chess Puzzles
    12
  • 82
    Cybench
    60
  • 4.88
    FrontierMath-Tier-4-v2-Private
    2.44
  • 34.39
    FrontierMath-Tiers-1-3-v2-Private
    23.86
  • 45.5
    GDPval
    42.5
  • 81.4
    GPQA diamond
    76.43
  • 26.5
    GSO-Bench
    14.71
  • 21.43
    HLE
    9.37
  • 66.3
    OSWorld
    62.9
  • 86.1
    OTIS Mock AIME 2024-2025
    77.76
  • 17.29
    PostTrainBench
    9.94
  • 3.75
    Remote Labor Index
    2.08
  • 54.4
    SimpleBench
    45.16
  • 41.8
    SimpleQA Verified
    23.6
  • 76.65
    SWE-Bench verified
    71.28
  • 63.1
    Terminal Bench
    46.5
  • 10
    VPCT
    9.7
  • 63.7
    WeirdML
    47.71
A higher number is not always a better model. Each score is task performance under a disclosed harness, and some of these benchmarks are saturated or scored under mixed harnesses. Follow any benchmark to its integrity grade before reading a win as decisive.

Follow the record

These models

  • Claude Opus 4.586.1
  • Claude Sonnet 4.597.73