GPT4o
https://chatgpt.com/share/673578e7-e34c-8006-94e5-7e456aca6f...
GPT4o
https://chatgpt.com/share/67357941-0418-8006-a368-7fe8975fbd...
GPT4o-mini
https://chatgpt.com/share/673579b1-00e4-8006-95f1-6bc95b638d...
GPT4o
https://chatgpt.com/share/673578e7-e34c-8006-94e5-7e456aca6f...
GPT4o
https://chatgpt.com/share/67357941-0418-8006-a368-7fe8975fbd...
GPT4o-mini
https://chatgpt.com/share/673579b1-00e4-8006-95f1-6bc95b638d...
Glass is not a pure element so that temperature is the "production temperature" but as an amorphous material it ""melts"" in the way a plastic material ""melts"" and can be worked at temperature as low as 5-700c.
I feel like without a specification the answer is wrong by omission.
What "melts" means when you are not working with a pure element is pretty messy.
This came out in a discussion for a project with a friend too obsessed with GPT (we needed that second temperature and i was "this can't be right....it's too high")