Q5 perplexity

#1
by grumd0 - opened

Isn't Q5 perplexity only "smaller" than BF16 simply because the distribution is +- 0.04?

BF16 -- 6.2671 +/- 0.04039 -- from 6.22 to 6.30
Q5_K_M -- 6.2564 +/- 0.04021 -- from 6.21 to 6.29

The real value could be anywhere in that range, so you can't really say that Q5 is better πŸ€”

Owner

It could be that my dual gpu and cpu inference was producing noises on the BF16 test and not on the Q6_K and Q5_K_M test.

It could be a phenomenon called regularization the higher BF16 models think too much and happen to overfit.

I quote from my local agent
"Sometimes quantization acts as a form of dropout/regularization. If the BF16 model has slight overfitting on the validation set, a quantized version might generalize slightly better on that specific sample."

Owner

So yeah the full model will still have more precision whereas the quantized one happen to aced that wiki raw text better.

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