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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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GPT-5.1 vs Grok 4.20

Verdict

Evenly split 3–3 across 6 shared benchmarks.

GPT-5.1 3 · Grok 4.20 3 · higher isn't always better — see caveats.

Per-benchmark head-to-head

GPT-5.1Grok 4.20
  • 72.8
    ARC-AGI
    89.5
  • 17.64
    ARC-AGI-2
    65.14
  • 23.7
    CL-bench
    22.2
  • 17.3
    CL-bench Life
    11.9
  • 47.6
    Terminal Bench
    57.3
  • 60.77
    WeirdML
    52.26
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

  • GPT-5.188.6
  • Grok 4.2089.5