What do you mean by a tool to fix it? The most common way to fix it is to add a second {} set around whatever you want to preserve the capitalisation of, i.e. author = {{ChatGPT} and Other Author}. There's no tool to fix it because the conversion to title case/-ish is a feature.

There should be a way to override it if you absolutely don't want to use the {} method, but that's not a tool. If you just don't want to replace it manually, there's almost certainly a find and replace button somewhere in whatever editor you use, but that has nothing to do with LaTeX or biblatex

What Zoe‭ said. That's not a common formatting issue, that's a common user input issue.

See also https://tex.stackexchange.com/a/386068/36296 for the correct input

Zoe‭ thank you, by tool mean a way to automate that process to fix many references at once. And it's about fixing since I don't want to convert titles to title case, but only fix Chatgpt -> ChatGPT and similar issues.