You can partially tell by the tokeniser; which gives you some hint into the training corpus mix.

</div> is four Gemma4 tokens, but one Qwen3.6 token.

Where do you find this information for each model?

	▲	ComputerGuru 15 minutes ago \| parent [-]
		The tokenizers are included in the open s̶o̶u̶r̶c̶e̶ weights releases; you wouldn’t be able to use the weights without the corresponding encoder/decoder, in fact.