4-bit is fine for models of all sizes, in my experience.
The only reason I personally don’t quantize tiny models very much is because I don’t have to, not because the accuracy gains from running at 8-bit or fp16 are that great. I tried out 4-bit Phi-3 yesterday, and it was just fine.
The only reason I personally don’t quantize tiny models very much is because I don’t have to, not because the accuracy gains from running at 8-bit or fp16 are that great. I tried out 4-bit Phi-3 yesterday, and it was just fine.