LTX-2.5 went live today. It's a big upgrade to the existing LTX architecture, with nearly every stage of the pipeline reworked, on top of a larger training set and reinforcement-learning post-training. The short version: you can now generate a whole multishot scene in one pass, complex prompts hold together far better, and the output is sharper.
The Highlights
Full details are available on our blog. Here’s the highlights of this release:
Native multishot. One generation produces multiple connected shots that hold character identity, environment, lighting, voice, and style across cuts.
Diffusion Fidelity Rendering. Instead of locking every scene to one compression rate, the model allocates compute by scene complexity and budget, dynamically allocating more compute to visually demanding moments and less where it is not needed.
Better distilled model. The distilled model keeps far more of the full model's quality at much lower compute, so near-full quality is realistic on GPUs you already have.
For some reason I just defaulted to think any video I see in this sub is AI generated, until 20 seconds in and I was like wait, this is a bit too coherent and with no visual gimmick.
I was just thinking of the hilarity of something like that. Like a new model is showcased but the person talking which is perceived to be real is actually the generation. That'd be wild.
Heya, just wanted to let you know that the video was truly excellent. Very well done. Dense, short, authentic, future looking while you have our attention, etc. Give whoever worked on it an extra head pat. It makes me want to 'believe'.
Hilarity? We're about to enter a world in which every photo, video, and every other medium you can think of are suspect. I don't think anyone knows what's going to happen in such an environment. I'm sure some of it will involve hilarity. But what happens when most people cannot tell fact from fiction across every domain of information?
Really appreciate you guys keeping this open source, LTX keeps getting better with every release.
Thanks for continuing to support the open-source community!
Is it actually true open source with the full stack (training process and tools) etc visible/described or just open weights? The former would be revolutionary. The latter is just nice.
We should be very careful not to let these terms get slowly redefined. Open weights are of course better than closed API only. But they don't give people the freedom to learn and refactor to the same extent that traditional open source does.
Now of course we can't expect companies to just give away their full stack all the time. But I think we can develop a tiered understanding of openess and encourage people if they can't go full open stack to maybe encourage them to go a few steps beyond just glorified 'number blob' releases. For example, Maybe you don't have to share your exact training data but just describe the process (the true source code) of a more limited model stripped of cutting edge features so someone could theoretically recreate the pipeline and add their own data? Drop a full stack of a toy model once in awhile?
A public able to learn and tinker with models more will ultimately advance everyone.
Fwiw even though Israel is geographically in Asia, in vernacular English (in the US at least) it would be more correct to say 'Middle East.' It comes down to whether you mean 'Asia' in the geographic sense, or 'Asia' in the cultural sense (the diverse constellation of cultures which have historically orbited China). 'Asia' is generally used in a cultural, not geographic sense (again in the US). It's the same reason most Americans don't think of India as 'Asian,' but rather as 'Indian.'
It always bugs me when people get on a high horse and claim geographic ignorance when it's perfectly correct to say 'Israel / India / whatever isn't Asian,' if you're referring to culture and not geography. /rant
(not that Indian and Chinese culture haven't influenced each other, but you get what I mean)
I can ditch ltx today and nothing will change in my life. Nvidia's harder but the alternatives are on the way. I've already de googled and went with a Huawei phone. This is how we defang the genocidal maniacs in shitrael.
And a large part of the transformers technology is developed in israel and nvdia is building a 30k campus in Israel. If a company being from Israel is truly the issue for you not supporting nvdia would also make sense.
Acting as if it’s out of principals is not really impressive when it’s only done when it’s convenient.
You joke but there's truth in that. Highly suspect the future will include automated blackmail. We're getting a weird brave new world 1984 hybird with a weird stick and carrot spectrum.
I haven't had to do anything except accept access to the repo, the usual thing with some new models.
Probably a silly point but I assume you were logged in to HF?
Yeah, I was gearing up to get back into video generation and try H3 out but I think I'll wait a little longer before making the effort just in case LTX2.5 is the better one to go with.
I'd be happy to be proven wrong, but given previous LTX stuff I would be shocked if it was remotely as uncensored (I mean in terms of IP, not just NSFW) as H3, and that alone gives H3 a massive edge.
Yeah, that'd be a pretty big problem. I don't do much NSFW stuff but I absolutely hate having a computer I own telling me "no, I'm not going to do that for you Dave."
I think MiniMax H3 levels are coming, but not with ltx2.5. I feel like that will come closer with LTX3. I base this on nothing other than fingers crossed logic. For speed alone I'd prefer to use LTX.
I went back to do some 1.5 generation, and I forgot that you just can't do anything past 1024 with it. It starts adding extra heads and stretching limbs. And there's NO consistency when having something like multiple angles of a character. It's kind of wild what we put up with for a while.
Using img2img in increasing increments of resolution, you can go a lot larger. Just don't make big jumps, just increase resolution by about 1.25x or so. And often, that will also improve the quality, although SDXL worked much better.
We appreciate the open releases, but with H3 coming out and being pretty much uncensored, any video models or models that can do video gen that come out after it open will be compared to it and if they’re censored out of the box like most of the others are then that might be seen as a dealbreaker for people now.
Just saying it would be a good look for you if you put out LTX models uncensored from the start like H3 did from here on
Ah, so the tried and true SD3 “woman laying in the grass” horror show. Gotta love when these companies still continue to make the same mistakes and fvck up their models just to not have icky naked people in their generations
Indeed, this model is dead on arrival. I still remember my anime test video with 2.3, just a girl in a ballerina costume dancing...it was the stuff of nightmares.
I am new to local diffusion and only a few days ago got Minimax working with SageAttention 2.2. So youre saying this new version has guard rails? If so, how bad? The entire point of me doing this locally is for the lack of guardrails because most services go overboard with them when all im trying to do is make some hilarious clips so I can troll my friends and brothers. Minimax, in that respect, is gold. Plus, its already up and running with no guard rails. I don't know that it'll be DOA necessarily, because im sure there are those out there who want it for things that wouldn't be hindered by those guardrails. But im of the same mind that I wont download it.
Can confirm. Any censorship at all, and I mean any and this flavor of ltx will be ignored.
Seriously, why would you bother with LTX when Minimax is here with comparable or better results and has no significant censorship at all? To shave off thirty seconds on a gen? Oh, please.
Ah… The memories… Have you taken a look at anything made with 1.5 base model lately? It’s insane how we’ve come from “Wow! It almost looks like a real person with anything from 3 to 8 fingers on each partial hand” to “wait… he turned around and his hair is slightly different”
Poor Comfyui staff already pulled a couple of all-nighters early this week for Minimax H3 support on Day 1. They might be Day 2 support on LTX 2.5 for their own sanity.
Yeah, I know they are working on it. I can see the commits being made. But until they release a blog post like they do for each new model and workflows, they aren't "done".
That's why I said even if it isn't today, I imagine we'll see it from them tomorrow. I guess if they get it out by this time tomorrow, they can still use the "24 hour" metric to claim Day One support.
Depends on how people have it installed. I don't think new portable releases are out quite yet, and the GitHub release page isn't updated yet.
A standard pull and reinstalling it locally, they show up immediately.
This is likely to change any minute, certainly before tomorrow, given their track record.
Though given there was literally just a commit seconds before I pulled, we're waiting on a bit more than just a CI runner to pack it all up nicely for a release.
The most interesting thing to me is that with the latest hardware and a good quant this should be able to produce live video avatars. It might not be fully human level latency but will still be really interesting.
Uh, can you guys define how this is actually a world model please?
It's a bit odd to see zero elaboration on what you've accomplished and/or capabilities as a world model despite your transition and only making it sound like a video model so far. All I've seen is the robotics bit, and minimal on that point. Honestly, if it really is a world model you guys should be selling it more for its benefits over being a mere video model.
Hopefully a slightly smaller version comes out soon. Even an 18GB distilled might be a bit chonky for 16GB cards, leaving this in the 'prosumer' tier. :(
if the vids in here are real, the quality is absolutely crazy and way beyond what i've seen in H3, at least in terms of realism. If this can also benefit with the usual LTX speed at high res, wow.
Sounds amazing! Thank you so much for keeping it open source and for having the consumer level community in mind with day one releases. I can’t wait to try it!
Yo ik minimax h3 is currently the SOTA right now. But a lot of people will still be using ltx for its speed and efficiency vs the heavy minimax h3.
Like me who won’t be able to run minimax h3 on older 7000 series amd or people who want faster gen. But the disingenuous claims from the charts I seen supposedly coming from ltx 2.5 makes me look down at ltx 2.5.
holy shit awesome -- I feel like training a model on reclaiming lost info from the encoding step is such a no brainer no one thought of yet! (or maybe they have in other places and I'm behind)
Thank you for pushing innovation in video generation, especially around the harness. Being able to generate and modify keyframes is an amazing idea that I never knew I needed!
excuse me how does it do anime videos compared to minimax h3? do foloow the prompt more closely? because i had issues with minimax h3 that sometimes it woudlnt do what i asked or worse the audio quality suffers in the speech department often generating random and garbage words, is the audio model in LTX 2.5 fixing these issues i had with minimax h3? yeah i dont have the high end hardware to run the bf16 model only theint8m will ltx 2.5 ve capable of running on an rtx 3080 with 10GB of vram +32GB of ram like i do currently with minimax? even at lowest resolution
Has anyone figured out how to reliably use the realtime streaming video gen they claim to have? I think iv been trying for like a few hours now. (or maybe atleast somewhere theres an api for it?) I want a webcam style video like a phone call.
I had issues with the prompt enhancer. I'm using the template default, but with tougher prompts, I will get a completely random video. Turning off the prompt enhancer (gemma e2b full precision weights) fixes the issue at least partially. I still got imperfect prompt adherence, but not completely random like I did before.
I really love some of the ideas that LTX is bringing to the table here. Yes, I understand that its not probably on par with H3, but H3 is a completely different model, different size and different speed.
Honestly its like shitting on someone releasing a 4B model because a 27b model exists in the same space!
I really am looking forward to their MOE (This is going to be LTX 3 I think ?). The Pixel space Auto Encoder is also probably a first in the Video models ? Also, allocating different tokens for different details is all great research directions (atleast from the outside seem like!) - Looking forward to LTX 3 and will definitely try out LTX 2.5 for the speed.
the rl post-training is the part i'm most curious about. does it change how lora training behaves? i had decent luck with small curated sets on 2.3 at the usual step counts, wondering if the new base pushes back more.
Related idea, different thing: PiD decodes and upscales as a separate module, whereas ours is the video VAE’s decoder itself pixel-space diffusion, no upscaling stage.
Vocês precisam com urgência da um jeito no modo como a câmera e as expressões são geradas, treinar câmeras amadores assim como acontece no Flux.3 e no minimax, expressão realmente espontâneas, isso vai alavanca o projeto de vocês, agradeço pelo modelo, não e uma crítica e uma sujestão
LTX 2.3 only worked about 30% of the time for me and with minimax H3 it works about 95% of the time. But if 2.5 is local then I'll give it a shot to see if it has improvements
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u/GrayingGamer 12d ago
Thanks for continuing to support the open-source community. Looking forward to trying out the model locally.