Artificial Analysis v5 goes 60% private: open models look far worse when benchmarks stop leaking

rickasaurus · x · 2026-10-29

Artificial Analysis released Intelligence Index v5, its biggest upgrade since January: for the first time 60% of the composite index is built on private test sets or held-out answers, with new benchmarks like FrontierCode 2.0 and a new Progress Index tracking capability over time on one continuous scale.

Quoting the news, LLMJunky highlights a telling pattern: when benchmarks stop being public, open models score significantly worse. He rates DeepSeek 4.1 Flash and GLM 5.3 as genuinely impressive, but pushes back on the "China caught up" / "Opus at home" narrative, arguing the industry now ignores nearly every public benchmark and hopes private evaluation restores credibility.

Related event: Artificial Analysis Launches Intelligence Index v5: Opus 5.5 Leads as Open-Weight Gap Widens to 12 Points(36 posts)→

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