Verdict
Evenly split 5–5 across 11 shared benchmarks.
Claude Fable 5.1 5 · Gemini 4 Argon 5 · 1 tied · higher isn't always better — check the caveats below.
Reported scores — protocols may differ. How we compare
Unknown: Gemini 4 Argon leads 2–1 across 3 shared unknown benchmarks (largest gap: Mystery Game Puzzles, 60.34 vs 53.73 — protocols undisclosed).
Coding: Claude Fable 5.1 leads 2–0 across 2 shared coding benchmarks (largest gap: FrontierCode, 50.91 vs 47.55 — single evaluator).
Math: Claude Fable 5.1 leads 1–0 across 2 shared math benchmarks (largest gap: FrontierMath-Tier-4-v2-Private, 87.8 vs 78.05 — protocols undisclosed).
Evenly split 5–5 across 11 shared benchmarks. Claude Fable 5.1 leads 5 benchmarks and Gemini 4 Argon leads 5, with 1 tied. Higher isn't always better — see the integrity caveats on each benchmark.
Claude Fable 5.1 and Gemini 4 Argon have 11 benchmarks in common in our data — those are the only rows where a direct, apples-to-apples comparison is drawn.
Claude Fable 5.1 leads coding 2–0. Gemini 4 Argon leads unknown 2–1.