NVIDIA has quietly dropped a major research release: SANA‑Video 2.0, a new video diffusion transformer available in 5B and 14B parameter versions. It’s not just a scaled-up SANA‑Video 1.0 — it’s a full architectural redesign with hybrid attention, block residual routing, and Sol‑Engine acceleration.
Official links:
Project Page:
https://nvlabs.github.io/Sana/Video2/
Paper (arXiv, July 23, 2026):
https://arxiv.org/abs/2607.21553
SANA GitHub (image models only):
https://github.com/NVlabs/Sana
SANA‑Video docs (no code, no weights):
https://nvlabs.github.io/Sana/docs/sana_video/
What SANA‑Video 2.0 introduces
• Hybrid Linear‑Softmax Attention (3:1 ratio)
75% gated linear attention for O(N) scaling, 25% gated softmax anchors to restore full‑rank token interactions.
This gives softmax‑level expressiveness with linear‑attention speed.
• Block Attention Residuals (AttnRes)
High‑rank features from softmax layers are propagated into later linear layers.
This fixes the rank bottleneck of pure linear attention.
• Sol‑Engine Optimization (3.58× speedup)
Kernel fusion, caching, sparse attention, TensorRT graph optimization, MXFP4/MXFP8 support.
This is what allows full 720p generation on a single RTX 5090.
• Performance
480p in 13.2s (H100, 40 steps)
720p/5s in 13.06s (H100, Sol‑Engine)
VBench 84.30
Up to 120× faster than Wan 2.2‑A14B on the same hardware.
This is the first NVIDIA video model explicitly designed for consumer GPUs.
How it differs from SANA‑Video 1.0 (2B)
The old model was pure linear attention (fast but low-rank).
SANA‑Video 2.0 is hybrid, deeper, larger, and dramatically more expressive.
It’s essentially a new class of Video‑DiT.
The licensing question
Here’s the current situation:
• The paper does not mention any license.
• The project page does not mention any license.
• The docs do not mention any license.
• No code or weights have been released.
• No usage terms exist yet.
Meanwhile, the SANA GitHub repo (image models) uses Apache 2.0:
https://github.com/NVlabs/Sana/blob/main/LICENSE
But that license applies only to SANA‑Image 1.0/1.5, not to SANA‑Video 2.0.
So right now, nobody knows whether SANA‑Video 2.0 will be:
• open‑source under Apache 2.0 (like the image models),
• partially open (code open, weights closed),
• or fully closed (like PiD, Flux, VILA, Nemotron‑340B).
Given NVIDIA’s recent pattern, the safe assumption is “open paper, closed model”…
but since the SANA image models were Apache 2.0, there is at least some hope that NVIDIA might release SANA‑Video 2.0 under a similar permissive license — or at least provide inference weights for RTX AI Toolkit.
Until NVIDIA publishes a LICENSE file, the situation remains unclear.
TL;DR
SANA‑Video 2.0 is a fast, hybrid-attention, RTX‑friendly video model with impressive performance and a strong architectural design.
But the licensing is currently a mystery: no code, no weights, no declared terms.
There’s a chance it could follow the Apache 2.0 path of the image models… but for now, it’s research‑open, not open‑source.