A licence to read against one to recognise
HunyuanVideo carries tencent-hunyuan-community. Step-Video-T2V carries MIT, with the same tag on the repository and on the model card. Both are large releases and only one of them can be cleared by recognising a string. As of 2026-09-22.
| Point | HunyuanVideo | Step-Video-T2V |
|---|---|---|
| Licence, as each vendor states it | tencent-hunyuan-community | MIT |
| The detail published beside it | A vendor-written licence, not a standard permissive one | The same tag on the repository and the model card |
| Size, from the same pages | Over 13 billion parameters | 30 billion parameters |
Inclusion rule. Two families whose published values in this column lead to opposite decisions. A pair that happens to agree is not listed, because agreement is already visible on the column summary. Order. The column itself first, then its detail, then the columns that qualify it.
1The cost difference is one afternoon, once
MIT has been read, argued about and litigated in public for decades. Clearing it for one release clears it for every release that carries it, which is the whole value of a standard name.
A vendor-written licence has to be read every time it appears, because nothing about the name tells a reader what is in it. That is a real cost and it is not a judgement about the terms.
2Both are published weights either way
Neither release is closed. Both can be downloaded, both ship a licence file, and both are in this register for the same reason. The difference is assessment cost, not access.
It matters most to whoever has to approve a plan. A team without legal support will reach for the recognisable name, which is a selection effect worth naming.
3Where the two licences sit in their families
HunyuanVideo publishes one set of weights described as over thirteen billion parameters, so its licence has one release to cover. Step-Video publishes a thirty billion parameter model under the same MIT tag in two places.
Neither family splits its terms by size, which one release in this register does. So the shorthand about the family is safe here in both cases.
- Licencetencent-hunyuan-community, a vendor-written licence rather than a standard permissive oneshown on the model card
- Licencemit, the same tag on the repository and on the model cardstated in the repository
4Sources
Read from github.com/Tencent-Hunyuan and github.com/stepfun-ai on 2026-09-22. Full entries: HunyuanVideo and Step-Video-T2V. What this column is quoting is on licence. Nearby pairs: Split, or one document, Borrowed or authored.