Background: 2K video generated in real-time by Ultra Flash
Ultra Flash is the first framework to achieve real-time high-resolution streaming video generation — producing 1K video at ~30 FPS and 2K video at ~18 FPS on a single GPU through cascaded causal streaming architecture.
~0 FPS
1K Resolution
960×1664
~0 FPS
2K Resolution
1440×2496
0 GPU
Single Device
B200 / H200
0 Steps
Denoising
Single-step SR
Abstract
While recent autoregressive video diffusion models achieve remarkable streaming quality, they remain confined to low resolutions (e.g., 480P), leaving efficient, scalable, real-time high-resolution video generation a fundamental open challenge. To bridge this gap, we present Ultra Flash, a cascaded streaming framework capable of real-time high-resolution video generation. Ultra Flash achieves ~30 FPS at 1K resolution and ~18 FPS at 2K resolution on a single B200 GPU through three key contributions: (1) an architecture-preserving T2V-to-TV2V super-resolution training paradigm coupled with an AIGC-oriented data degradation pipeline that effectively preserves the generative capability of the base model; (2) a causal streaming latent upsampler paired with a high-resolution decoder, which enhances spatiotemporal coherence while enabling efficient latent spatial scaling; and (3) a cascade high-resolution streaming video generation optimization scheme that performs hybrid-reward-enhanced sparse causalization and single-step distillation, then introduces cascaded streaming self-forcing preference optimization with dynamic cache management, jointly enhancing overall coherence, improving quality, and enabling real-time streaming.
Three core innovations that enable real-time high-resolution streaming video generation.
T2V-to-TV2V SR Training
Architecture-preserving paradigm that converts any pre-trained T2V model into a generative super-resolution model without modification, with AIGC-oriented degradation.
Causal Streaming Upsampler
Ultralight causal memory network (~2M params) that upsamples latents with spatiotemporal coherence, adding <5% pipeline overhead.
(a) T2V-to-TV2V SR Training. (b) Causal Latent Upsampler & High-Resolution Decoder. (c) Hybrid-Reward-Enhanced Sparse Causalization and Single-Step Distillation. (d) Cascade High-Resolution Streaming Video Generation Optimization.
Results
Efficiency Comparison
Method
Resolution
Steps
FPS ↑
Latency (ms) ↓
Streaming
CausVid
480×832
4
24.4
123
✓
Self Forcing
480×832
4
32.0
125
✓
Causal Forcing
480×832
4
31.2
128
✓
DummyForcing
480×832
4
28.0
143
✓
Self Forcing + FlashVSR
768×1408
5
8.0
500
×
Ultra Flash (Ours)
960×1664 (1K)
4
30.0
40
✓
Ultra Flash (Ours)
1440×2496 (2K)
4
18.0
67
✓
Gallery
Real-time 2K streaming video generation results. Hover to see the text prompt.
A child in a cozy winter outfit, blowing gently on a steaming mug of hot cocoa to cool it down.
A cinematic closeup and detailed portrait of a reindeer standing in a snowy forest at sunset.
A cinematic over-the-shoulder shot of a writer sitting at a cluttered desk, lost in thought as they gaze out the window.
A close-up portrait of a woman, her face illuminated by the side lighting, capturing her delicate features.
A close-up shot of a futuristic cybernetic German Shepherd, showcasing its striking brown and black metallic features.
A cyberpunk-style digital illustration of a metal skull growing muscle tendons and flesh, set in a dark futuristic laboratory.
A cyberpunk-style illustration depicting a lone robot navigating a neon-lit cityscape.
A detailed and warm moment captured in a traditional Chinese ink wash painting style.
A detailed illustration in a realistic style depicting a raccoon wearing a classic detective's hat.
A close-up shot of a confident fashion influencer in a chic winter outfit, posing for a photo shoot.
A close-up shot of a woman gently kissing a baby on the cheek, leaving a subtle lipstick mark.
A scientific laboratory scene in a detailed digital painting style, featuring a panda wearing a white lab coat.
A close-up shot of a stunning diamond ring, showcasing its intricate facets and brilliant cut.
A vintage film-style photograph captures a moment between two women, one whispering a secret into the other's ear.
A close-up shot of a young woman deeply engrossed in solving a complex puzzle, her forehead creased in concentration.
A melancholic scene from a vintage film-style photograph captures a woman's lips trembling with sadness.
A close-up shot of a Victoria crowned pigeon in a naturalistic wildlife photography style, showcasing its elegant blue feathers.
A Japanese animated film-style scene of a young woman standing on a ship, looking back at the camera with wind in her hair.
A close-up of honey being drizzled onto pancakes, the thick golden liquid flowing slowly and smoothly.
A serene mountain lake at night, reflecting a starry sky, with a small boat gliding silently across the water.
A dramatic space scene in the style of a sci-fi movie poster, featuring a sleek silver spaceship being pulled into a black hole.
A dynamic and explosive basketball moment captured in a high-energy action style, showcasing a basketball player dunking.
A fantastical aerial landscape in the style of a high-fantasy illustration, depicting a floating island with waterfalls cascading into clouds.
A vibrant and lively vlog-style photo of a corgi in tropical Maui, showcasing the dog energetically playing on the beach.
An arc shot around a couple standing under a blooming cherry blossom tree, with petals gently falling around them.
A surreal and dreamlike scene in the style of a cyberpunk film, depicting New York City submerged underwater.
A post-apocalyptic city scene in a gritty, realistic style, where nature has reclaimed the urban landscape.
A dramatic landscape painting in the style of a Chinese ink wash, depicting a vast desert with towering sand dunes.
A vibrant anime illustration in a dynamic, thick-line painting style of a young girl blowing a kiss.
A slow-motion video captures a drop of liquid mercury, gleaming with a silvery sheen, bouncing gracefully on a surface.
A full-body shot of a man crafted entirely from rocks, walking through a dense forest.
An adorable kangaroo wearing vibrant purple overalls and stylish cowboy boots takes a leisurely stroll down a city street.
Citation
@inproceedings{luxury2026ultraflash,
title={Ultra Flash: Scaling Real-Time Streaming Video Generation to High Resolutions},
author={Luxury and Huang, Jie and Fan, Zihao and Ma, Xiaoxiao and Li, Yuming and Zhuang, Jun-hao and Xue, Zeyue and Fu, Siming and Li, Haoran and Zhong, Mingchen and Zhang, Guohui and Ma, Shichen and Liu, Yijun and Shi, Jiaqi and Ma, Yanwen and Su, Yaofeng and Wang, Haoyu and Li, Yaowei and Zhang, Songchun and Jin, Weiyang and Bian, Yuxuan and Zhang, Shiyi and Xu, Haojun and Lu, Shuai and Han, Xin and Tang, Wei and Huang, Haoyang and Duan, Nan},
booktitle={Advances in Neural Information Processing Systems (NeurIPS)},
year={2026}
}
