Tier 3 Practical open-weight
What the publisher claims: open weights, open model
The one-liner: Infrastructure-grade world model under a promising-but-unapproved open license.
The six questions
Ungated weights on HF and NGC.
OpenMDW-1.1 permits commercial use and derivatives, but is a custom Linux Foundation license not yet OSI-approved.
Runs on NVIDIA GPU stacks with released tokenizers and framework.
Dataset curation and post-training recipes published for parts of the family; full corpus not released.
Pretraining at this scale is not reproducible from published material.
NVIDIA publishes Cosmos 3 checkpoints and a fine-tuning framework under the Linux Foundation's OpenMDW-1.1 licence in a public repo, but development and releases remain NVIDIA-controlled with no community roadmap.
License
NVIDIA Open Model License / OpenMDW-1.1 — license source ↗
- OpenMDW-1.1 submitted to OSI license review 2026-08-14, not approved
What is actually released
- Nano 16B / Super 64B / Edge checkpoints (ungated)
- tokenizers
- fine-tuning framework
- post-training scripts
Why it matters
The test case for OpenMDW: if OSI approves it, a whole class of NVIDIA releases moves from custom-terms to genuinely open source.
Sources
- https://huggingface.co/nvidia/Cosmos3-Super
- https://huggingface.co/nvidia/Cosmos3-Nano
- https://openmdw.ai/license/1-1/
- https://lists.opensource.org/pipermail/license-review/2026-August/006135.html
Derived from the openness dataset behind But Is It Open? — snapshot 2026-11-07 ↗. Scores are qualitative readings of the cited evidence, not verdicts; tier measures openness, not intelligence.