Hi. I’m using Llama-2 for my project in python with transformers library. There is an option to use quantization on any normal model:

model = AutoModelForCausalLM.from_pretrained(
    "meta-llama/Llama-2-13b-chat-hf",
    load_in_4bit=True,
)

If it’s just a matter of single flag, and nothing is recomputed, then why there is so much already quantized models in the hub? Are they better than adding this one line?

  • llama_in_sunglasses@alien.topBEnglish
    1·
    1 year ago

    load-in-4bit takes a long time to load a model and the performance is poor in both speed and output quality.

    I have compared a bunch of quant methods at https://desync.xyz/ for Mistral, llama-7b, orca2-13b if you are interested.