OmniQuant

Not on iOS. On macOS, I personally think WizardLM 13B v1.2 is a very strong model and keep hearing good things about it from users on our discord and in support emails. Now that there's OmniQuant support for Mixtral models[1], I'm plan to add support for Mixtral-8x7B-Instruct-v0.1 in the next version of the macOS app, which in my tests, looks like a very good all purpose model that's also pretty good at coding. It's pretty memory hungry (~41GB of RAM), but that's the price to pay for an uncompromising implementation. Existing quantized implementations quantize the MoE gates, leading to a significant drop in perplexity when compared with results from fp16 inference. [1]: https://github.com/OpenGVLab/OmniQuant/commit/798467

I think OmniQuant is notable because it shifts the bend of the curve to 3-bit. While < 3-bit still ramps up, it's notable in that it's usable and doesn't go asymptotic: https://github.com/OpenGVLab/OmniQuant/blob/main/imgs/weight... What EXL2 seems to bring to the table is that you can target an arbitrary quantize bit-weight (eg, if you're a bit short on VRAM, you don't need to go from 4->3 or 3->2, but can specify say 3.75bpw). You have some control w/ other schemes by setting group size, or with k-quants, but EXL2 is definitely allows you to be finer grained. I haven't gotten a chance to sit down with EXL2 yet, but if no one else does it, it's on my todo-list to be able to do 1:1 perplexity and standard benchmark evals on all the various new quantization methods, just as a matter of curiosity.