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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 4.1 vs Claude Opus 4.5

Verdict

Claude Opus 4.5 leads 13–0 across 13 shared benchmarks.

Claude Opus 4.1 0 · Claude Opus 4.5 13 · higher isn't always better — see caveats.

Per-benchmark head-to-head

Claude Opus 4.1Claude Opus 4.5
  • 42
    Cybench
    82
  • 2.44
    FrontierMath-Tier-4-v2-Private
    4.88
  • 12.63
    FrontierMath-Tiers-1-3-v2-Private
    34.39
  • 43.6
    GDPval
    45.5
  • 69.7
    GPQA diamond
    81.4
  • 7.06
    HLE
    21.43
  • 68.86
    OTIS Mock AIME 2024-2025
    86.1
  • 52
    SimpleBench
    54.4
  • 34.8
    SimpleQA Verified
    41.8
  • 73.35
    SWE-Bench verified
    76.65
  • 38
    Terminal Bench
    63.1
  • 2.5
    VPCT
    10
  • 42.76
    WeirdML
    63.7
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 4.185.38
  • Claude Opus 4.586.1