Whisper works surprisingly well with numbers. I can say numbers, both integer and with decimal points, and get fairly accurate results, but it doesn't do negative numbers. I tried using "minus" and "negative" prefixes, but whisper just returns those words. I can fairly easily fix this with a little post processing, but am I missing something here? Here's an example:
Screenshot 2025年08月09日 135615
It seems like Whisper must be doing something special with "point", because all of the numbers above, including the ones with decimal places, were correctly interpreting the word "point" I used to inject the decimal point.