Bonsai 27B: A 27B-Class model that runs on a phone

alvatech

TIL that 1 bit models are actually 1.58 bit with three values +1, 0 and -1

liuliu

The problem, of course, is if you run the UD_Q2 variant (Unsloth) which does only post-training, the number is pretty close to 1-bit model here and the 5% drop in tool-call is significant than it suggests in real-life use cases.

Havoc

This must be some sort of unpublished app? I can just see their image tool on the app store

simonw

The models themselves are showing up on Hugging Face here: https://huggingface.co/prism-ml/models I've tried a couple in LM Studio - the GGUF one and the MLX one - but neither worked there. Anyone else get them to work? Might be that LM Studio needs to upgrade their llama.cpp or MLX engines first.

xyzsparetimexyz

That's awesome. What's the largest model that could fit onto a single 16gb gpu at 1.125 effects bits per weight?

syntaxing

For those curious about their demo, I’m pretty sure it’s using Locally AI (iOS only) that lmstudio acquired/aquihired a couple months ago.

erelong

I was trying Ornith 9B locally (it's up on Ollama) which claims: > Ornith-1.0-9B, which can be easily deployed on edge devices, matches or exceeds the performance of much larger models such as Gemma 4-31B and Qwen 3.6 35B. https://deep-reinforce.com/ornith_1_0.html Only tried it so much so far; it did a little better than Qwen 9B

syntaxing

I don’t know if the llama cpp implementation is wonky (and only supports the binary version) but it’s a lot slower than 35B-A3B @ Q4_KM + MTP with CPU offloading.

sigbottle

What's the hiring space and business strategy around all of these smaller AI labs? Its really cool that people like these guys get paid to optimize models and give them out for free (open source). Do a lot of these labs have forward deployed engineers doing integrations with customers who want local models? Is there a general shift towards the local model crowd?

thomasjb

I've been watching and waiting for this, interested to see how smart it is, as it fits with my interest of getting the smartest possible model running in 10GB of VRAM (RTX3060 that has to drive 2 monitors and run an llm)

kristianp

Apparently Apple is "in talks" with the PrismML: https://www.cnbc.com/2026/07/14/apple-prismml-ai-compression...

luckystarr

Tried it on Android and got "!!!!!!!!!!!!!" for answers.

erwan577

The KV-cache memory usage also seems remarkably frugal, even at the full context length. That could make this model particularly useful in multi-agent coding workflows. I wish KV-cache memory usage and related optimizations were discussed more clearly in new model announcements and demos.

wy35

Entire blog post seems to be AI-generated :/

theLiminator

This is useful research, but this particular model itself is likely absolutely useless.

Arcuru

Awesome! I've been waiting for them to start scaling ternary models for over a year[1]. Excited to try it out, typical Qwen 27B is too heavy for me to run on my local hardware at reasonable speeds. [1] https://jackson.dev/post/dont-sleep-on-bitnet/

comandillos

Quite weird that heavy quantization method on a dense model gives better results than slightly quantized MoE models like 35B-A3B from Google. At this point all the different quantization and 'compression' (look at MPO applied to LLMs...) techniques start feeling a bit like snake oil. It's just gut feeling - or scores on benchmarks models are optimized for - what ends up deciding whether a technique is good enough or not.

motbus3

I need help understanding this. I understood that the magic here is the quantization that allows it to use from 50G to 4G and their process retain most of the intelligence within Pareto limits of gain. And then they proceed to compare with other quantized models as in the level of intelligence per size. It gets to my attention though that the performance in tool calling is mostly affected which is a problem for other small models. How does this model compare to a recent 4G model? How do we know it retained intelligence from the parent rather then being fine tuned for the benchmarks? I am not shtng on them or anything. I'd rather find it amazing, BUT given my limited knowledge, I feel the results miss fair comparison plots and the ones might be misleading. Buy I also reckon it might be me the problem. Anyone care to explain this poor silly fellow some of those points?

0xbadcafebee

27B is way more than you need for a phone. Doesn't matter how much you try to compress it, it's the wrong application of the wrong tool. There are already useful tiny models that fit on phones and do basic things really well. Dumb down a big model too much and it becomes worse than a small fine-tuned model.

kamranjon

After using a highly capable 2-bit quant as my daily driver for months now, I get pretty excited about releases like this. After a few days for the kinks to be worked out, I’ll be excited to try it.