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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 3 Opus vs Llama 3.1-405B

Verdict

Evenly split 4–4 across 8 shared benchmarks.

Claude 3 Opus 4 · Llama 3.1-405B 4 · higher isn't always better — see caveats.

Per-benchmark head-to-head

Claude 3 OpusLlama 3.1-405B
  • 10
    Cybench
    7.5
  • 29.55
    GPQA diamond
    34.55
  • 37.48
    MATH level 5
    49.77
  • 79.47
    MMLU
    79.33
  • 4.63
    OTIS Mock AIME 2024-2025
    9.63
  • 8.2
    SimpleBench
    7.6
  • 23.18
    WeirdML
    21.38
  • 77
    Winogrande
    78.4
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 3 Opus79.47
  • Llama 3.1-405B93.73

Llama 3.1-405B vs …

  • vs PowerMoE-3b
  • vs Claude Fable 5
  • vs GPT-5.5
  • vs Gemini 3.1 Pro
  • vs phi-3-small 7.4B