It appears to be comparing a version number.
ChatGPT would be correct if we were referring to software versions.
This response is brought to you by Python, whose version history includes releases like 3.8, 3.9, and 3.11.
It seems yours is malfunctioning. Mine stated, “The number 9.9 is greater than 9.11. While 9.11 has more digits, the decimal 9.9 is closer to 10, whereas 9.11 is closer to 9.”