A count split in two against one round figure
Allegro publishes VAE at 175M and DiT at 2.8B. Step-Video-T2V introduces itself as a 30 billion parameter model. One tells a reader what the model is made of; the other tells them how large it is. As of 2026-09-22.
| Point | Allegro | Step-Video-T2V |
|---|---|---|
| Size, as each vendor states it | VAE 175M and DiT 2.8B | 30 billion parameters |
| The detail published beside it | Published as two counts, not one total | From the repository's own introduction |
| Licence, from the same pages | apache-2.0 | MIT |
| Hardware, from the same pages | 9.3G BF16 with cpu_offload | 78.55 GB peak at 768px768px204f |
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 labels are the information
VAE and DiT are specific: a variational autoencoder for the latent space and a diffusion transformer for the denoising. A reader who knows those words knows roughly how the run behaves before touching it.
Thirty billion parameters says nothing about structure. It is the right figure for planning storage and the wrong one for guessing which component quantising would help.
2Which component the memory belongs to
Allegro's swing from 9.3G with offload to 27.5G without is far larger than a 175M autoencoder could account for, so the offload is moving the transformer. The split makes that legible.
Step-Video's memory table barely moves across three configurations, from 78.55 GB to 72.48 GB, which says the weights dominate. Different information, arrived at differently.
3Round numbers are descriptions
Thirty billion is round enough to be a characterisation rather than a measurement, and the register does not sharpen it. The repository's own introduction is the source.
Allegro's figures are equally the vendor's own, from the model info table on the card. Neither release is estimated here and neither is combined into a total.
- Model sizeVAE: 175M, DiT: 2.8Bpublished as two counts rather than one total
- Model size30 billion parametersfrom the repository's own introduction
4Sources
Read from huggingface.co/rhymes-ai and github.com/stepfun-ai on 2026-09-22. Full entries: Allegro and Step-Video-T2V. What this column is quoting is on size. Nearby pairs: No count, or three, Count and cost inverted.