Artificial Analysis Openness Index S
AI benchmark · Openness
What is Artificial Analysis Openness Index?
Composite Artificial Analysis measure of model openness across weights availability, licensing, data transparency, and methodology transparency.
Tier S · a leaderboard, listed apart
S
The standard: frontier labs report it, or a trusted evaluator scores hundreds of models on it.
How much stands behind a tier: usage, who backs it, a confirmed line from its own site or paper, and a clear read on X. High with three of the four, medium with two, low otherwise.
- 205 models scored
- in curated RL directories (2 pts)
How we got to tier S
- Adoption: 205 models scored. Tier S.
- On X: unclear, none buzz No move.
- In curated RL directories: 2 points, a floor of C.
- Not yet confirmed by a line from its own site or paper.
- Judged a leaderboard, arena or index rather than one benchmark (or not a benchmark at all): listed apart.
A clear view on X moves a tier one step up or down; most entries don't move. How tiers work.
Not on the map yet: no line from its own site or paper places it in a domain.
Next: browse all benchmarks. Entry from the RL Research daily scrape of public sources, 2026-10-11 snapshot.