Permissive licence, as the register uses it
A permissive licence is one whose text is standard: Apache 2.0 and MIT are the two that appear in this register. The value of the name is that it is a lookup key rather than a document to be read again. As of 2026-09-22.
| Question | Usually answered |
|---|---|
| Copying the weights | Yes, subject to attribution |
| Modifying them | Yes |
| Redistributing them | Yes, carrying the licence along |
| Selling generated output | Not addressed |
Inclusion rule. Questions a reader brings to a weights licence. A question no standard licence addresses keeps its row, because the silence is the answer. Order. From the narrowest use to the widest.
1Standard text is the feature
Apache 2.0 and MIT have been read, argued about and tested in public for decades. That history is why a reader does not have to interpret them again, and why an approval process can treat the name as sufficient evidence.
A bespoke licence may well be more generous in substance. It still costs an hour of somebody's attention every time it appears, because the name carries none of the text.
2Permissive is not unconditional
Attribution is normally required, the licence normally has to travel with any copy, and patent and trademark clauses vary between the standard documents. None of that makes a licence non-permissive; all of it is worth reading once.
The gap that catches people is output. What may be done with the video a model produces is usually not addressed by the licence on the weights, and silence is neither permission nor refusal.
3Where this lands in the register
Nine cells in the licence column hold a standard name, and those are the rows a reader can clear without opening anything. The rest hold a name belonging to a company, and one family splits its terms between two of its own releases.
The column is complete: every family states something. That makes it the only column here with no gaps, which is worth knowing when a reader is deciding where to start.
A reading note, not an entry: no vendor value appears on this page. Where the register records this term for a particular release, it is on the licence column and on that family's own page. Nearby terms: Vendor-written licence, Acceptable-use policy.