Artificial Analysis Rushes Out Index v4.2 With Private Test Sets as Benchmarks Chase Frontier Models

solyarisoftware · x · 2026-09-06

Artificial Analysis shipped Intelligence Index v4.2, splitting parts of its upcoming v5 to keep pace with the frontier. Changes: AA-Briefcase (agentic knowledge work eval with a private test set), GDP.pdf (long-context reasoning across 4,592 PDF pages), removal of the saturated GPQA Diamond, plus heavier weighting on held-out sets and grading upgrades to prevent gaming. @weiping quipped it's the first time seeing a benchmark scramble overnight: "it used to be benchmaxxing; now it's model-maxxing."

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