> This is always the problem with the 2-bit and even 3-bit quants: They look promising in short sessions but then you try to do real work and realize they’re a waste of time.
replyIt would be nice to see a scientific assessment of that statement.
Lots of people seem to use 4bit. Do you think that's worth it vs a smaller model in some cases?
replyGenerally the perplexity charts indicate that quality drops significantly below 4-bit, so in that sense 4-bit is the sweet spot if you're resource constrained.
reply4 bit is as low as I like to go. There are KLD and perplexity tests that compare quantizations where you can see the curve of degradation, but perplexity and KLD numbers can be misleading compared to real world use where small errors compound over long sessions.
replyIn my anecdotal experience I’ve been happier with Q6 and dealing with the tradeoffs that come with it over Q4 for Qwen3.5 27B.