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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 4.6

Verdict

Claude Sonnet 4.6 leads 7–5 across 12 shared benchmarks.

Claude Opus 4.5 5 · Claude Sonnet 4.6 7 · higher isn't always better — see caveats.

Per-benchmark head-to-head

Claude Opus 4.5Claude Sonnet 4.6
  • 18.4
    APEX-Agents
    23.7
  • 80
    ARC-AGI
    86.5
  • 37.64
    ARC-AGI-2
    60.42
  • 12
    Chess Puzzles
    13
  • 81.4
    GPQA diamond
    83.16
  • 66.3
    OSWorld
    72.1
  • 86.1
    OTIS Mock AIME 2024-2025
    85.78
  • 17.29
    PostTrainBench
    16.42
  • 41.8
    SimpleQA Verified
    29
  • 76.65
    SWE-Bench verified
    75.21
  • 63.1
    Terminal Bench
    53.4
  • 63.7
    WeirdML
    66.07
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 4.686.5