Very inflated statement when it comes to GPT4 since it is a MoE model with 8 separate models each an expert in one area, and you can't replace all 8 models with one model trained for $19.
I call BS on this claim. Maybe it matches GPT4 in the narrow domain you fine-tune it for, and if that can be done for $19 then for $19*8 you can take OpenAI out of business. That doesn't add up.