Unfortunately, the collaboration did not turn out very well.
The client closed the project after my appeal to arbitration.
After receiving the finished work, I expressed a desire for an AI check. Nothing about this was stated in the technical assignment. However, I agreed to meet and provided screenshots from 6 different resources, indicating that the text was written by a person. Which is logical, since I wrote it, not a robot.
The client performed a check on their website, which requires registration. The result showed that the text was partially generated.
P.S.
After completing the project, I became curious about what platform it was and why he was so attached to it. I uploaded one of my first tests, when AI did not yet exist. The result was 54% GPT. Nice service, nothing more to add.
I cannot recommend the client.