Muse Spark Open - Hacker News

Posted by bigwheels 6 hours ago

https://dev.meta.ai/resources/blog/build-with-muse-spark-ope...

https://huggingface.co/meta-models/Muse-Spark-Open-816B-A42B

https://9to5mac.com/2026/10/15/meta-launches-new-muse-spark-...

569 points | 326 commentspage 5

redox99 5 hours ago|

It performs worse than Muse Spark 1.3 and 1.2. And it has an outdated attention mechanism which at 1M tokens will need over 200GB just for the KV cache.

Very disappointing release. We're lucky to have Chinese models.

sourcecodeplz 6 hours ago||

from what i understand its somewhere between muse spark 1.3 and 1.2 in some coding benches.

spwa4 6 hours ago||

https://huggingface.co/meta-models/Muse-Spark-Open-816B-A42B...

816B model, A42B active parameters

Unsloth and Meta have guides on how to run the model, but allow me to summarize: You & Me won't be running this one.

https://unsloth.ai/docs/models/muse-spark-open

hermitShell 5 hours ago||

Not at an appreciable token rate. I wonder if these large open weight models are considered safer to release for that reason? I'm thinking no because any small to medium size criminal organization or state funded group will be able to cobble together the resources to achieve some kind of runtime. Even at 10 tok/sec, making bioweapons at 10 tok/sec is concerning.

spwa4 5 hours ago||

You do realize that a high school Chemistry course actually contains all the details you need on both bioweapons used in WW2, right? Plus several others you could use. Those books contain the answer to why those 2 people died in the RV in Breaking bad. And they should. They also contain information on Mustard gas and Zyklon-B, including preparation instructions, but of course, you'll have to puzzle it together. That these substances can be used as bioweapons is heavily deemphasized, but you just can't reasonably avoid mentioning and showing them.

Also these books contain maybe not the solution to making thermobaric explosions, but certainly the principle and show you exactly what problem you'd have to solve to make those weapons.

Just about the only thing they stopped teaching is that if you combine that knowledge with which plants contain what ... there's an incredibly easy way to make pudding with cyanide that's safe to touch, for example. That they suppressed.

But at least for Europe, the number of lethal plants just growing along essentially every road or in every forest numbers in the dozens. Including a very famous one they teach every kid about.

Of course, in both cases, the real challenge is making them and deploying them without killing yourself.

We are not safe from bioweapons because nobody knows how to make them. That's not it.

scotty79 4 hours ago||

> The 2-bit quant fits on devices with 256GB of RAM, VRAM or unified memory.

Ouch. I wonder how it compares to Qwen 3.8 running with 4-bit quant on 10 times less VRAM.

maxdo 6 hours ago||

great, I've been reading series of papers related to open source/open weight LLM Backdoors.

It's 100% possible, curious when will be the first incident.

Having something built by entity with HQ in the wester world is always a bit safer. That could be mistral, but they decided to be a consultancy company, not an ai lab.

wren6991 6 hours ago||

Right. The US has famously never installed government-mandated backdoors in security-critical technology like Dual_EC_DRBG.

maxdo 6 hours ago||

everyone is doing backdoors, except eu, they just receive bribes from those who install backdoors.

the only difference is: the backdoor is made to kill people like you or not. I'd rather have a backdoor that is installed to kill someone on the different continent, e.g Iran leadrship, not in my country/city.

bigyabai 4 hours ago||

This post could be framed with golden filigree, titled "The Most HN Comment Ever Written" and perhaps displayed near other artworks like a Juicero, Flock camera or Sam Altman's disinterred belongings.

Orange Site will have a properly interesting history museum, at the rate we collect curiosities like this.

vrganj 4 hours ago|||

Mistral just released Mistral Large 4?

maxdo 3 hours ago||

and it's already not competitive from day 1

vrganj 2 hours ago||

With Muse Spark Open it is.

bjarnehamre 6 hours ago||

Link to papers?

dcchambers 5 hours ago||

I don't think this is going to change anything for most people, but it certainly fits a niche for US-based companies that refuse to run Chinese models and only want to run their own inference.

But I'm really happy to see Meta do this and I hope they continue to release open models in the future. Open models are really the only way to ensure fair access to AI for everyone.

lern_too_spel 5 hours ago||

What is the point of releasing "The Most Capable US Open‑Weight Model?" I can understand why I might care about the location of a model serving provider, but why should I as a model user care about the location that an open weights model was trained?

sgt101 6 hours ago||

So: WAR!

jahrichie 4 hours ago||

Good luck running that on your home infra lol, requires 25k in mac minis

aaroninsf 6 hours ago|

Never meta.

Do not run, do not support, do not use.

scrollop 6 hours ago|

I wonder if all the AI companies are making dossiers on their users.

I would say meta and google definitely are. xAI? Probaly. The others? Perhaps. Perhaps Anthropic less than the others?

ceroxylon 5 hours ago||

It appears to already be far beyond that, they are working with each other[0]:

>ChatGPT, Claude, Grok, DeepSeek, Perplexity, Gemini, Copilot, Le Chat de Mistral and Meta AI filter your data to Google, Meta, and several of the main data brokers.

[0] https://jorgegarciaherrero.com/en/prompt-like-a-butterfly-st...

https://jorgegarciaherrero.com/wp-content/interactivos/20260... [PDF]

More comments...