COS-PLAY C

AI benchmark · Long-Horizon

Publisher
Good Start Labs
Domains
Long-Horizon
On X
@goodstartlabs ↗
Tier
C why
Snapshot

Open benchmark ↗goodstartlabs.com/research

Latest from Good Start Labs on X

@goodstartlabs ↗

What is COS-PLAY?

COS-PLAY (arXiv 2604.20987)

Tier C

C

Niche: a handful of models scored, or built by an RL vendor.

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.

  • built by Good Start Labs
  • in curated RL directories (2 pts)
How we got to tier C
  1. Adoption: built by Good Start Labs. Tier C.
  2. Not yet read on X.
  3. In curated RL directories: 2 points, a floor of C.
  4. Not yet confirmed by a line from its own site or paper.

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.

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Next: browse all benchmarks. Entry from the RL Research daily scrape of public sources, 2026-10-11 snapshot.