CR-K39

Reference

Frontier AI is concentrated and becoming less transparent: industry produced 90%+ of notable models in 2025; transparency index average fell from 58 to 40.

Claim made: 2026
Who: Stanford AI Index 2026
Target date: —
Status checked: 28 September 2026

Source

AI Index 2026 report page; AI Index 2026 takeaways [F]

Evidence to date

Counter-signal: open–closed performance gap narrowed from 8% to 1.7% in a year (AI Index 2025).

Next indicator

AI Index 2027