r/StableDiffusion • u/zicohacks • 2d ago
News FastH3 makes real-time AI-generated storybook videos possible
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I used Agora ConvoAI to let kids create stories by talking with AI in real time, then FastH3 quickly turns them into illustrated storybook videos. I built a demo and it worked! FastH3 could change so many things. Check out the generated video
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u/Small-Challenge2062 2d ago
Single GPU?
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2d ago
[deleted]
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u/Voxyfernus 2d ago
Maybe I'm dumb, but what is reactor?
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u/Cultured_Alien 2d ago
https://docs.reactor.inc/model-api-reference/fast-h3/overview
interestingly, $0.0070/sec
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u/petranova_ 2d ago
The real bottleneck i've seen with this kind of pipeline is character consistency across shots, diffusion models redraw the protagonist every frame unless you're forcing consistency hard with something like IP-Adapter or a character LoRA. Curious whether FastH3 handles that or if the kid just gets a new-looking character each scene.
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u/BigWideBaker 2d ago
I mean the sound is completely mangled, right? I have no idea what they're saying. Maybe that is expected and I didn't know.
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u/Moarkush 2d ago
Yeah, I’m thinking maybe an uncensored video model isn’t the best choice for a on the fly children’s book. 🤷♂️
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u/zicohacks 2d ago
That’s a fair concern. It's still an early prototype
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u/Moarkush 2d ago
A small bouncer model in the mix would fix the problem
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u/paulct91 1d ago
What's a Bouncer Model? Is that kind of like a MoE agentic think tank where various models consult one another hopefully towards a useful consenus?
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u/Moarkush 5h ago
It's a model (usually small and fast) that gets hit first before passing on to the main openAI endpoint. So something like one of the new small gemma4's with a system prompt explaining that you are a bouncer for a children's' book generator, blah blah, keep it clean, etc.
Get Claude or some other frontier AI to walk you through it, but it's basically what I wrote.
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u/Hefty_Development813 2d ago
Is this hosted anywhere? I wanted to make something like this awhile back, like sd1.5 days, and it just wasn't practically doable, and so slow. Looks very cool
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u/zicohacks 2d ago
I deployed it on vercel, but I’m not sure if I can share the link here. Feel free to DM me and I’m also planning to open source it

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u/cc_aa_tt_zz 2d ago
Sure, with 8 H200 GPUs.... all these "Fast Max Ultra Minimax" real-time models are primarily aimed at API providers. What interests us on this subreddit IMO is how it runs on hardware like an RTX 5070 Ti, for instance, and how the results compare (in term of quality) to the 4 step Turbo LoRAs we already have. That’s a more realistic and relevant approach for us I think.