Ask HN: Any tool to remove AI Watermark from image?

I have created few AI images using Claude.

The image is perfectly created. But at the bottom there is a watermark image of AI that keeps coming up.

I want to remove that watermark. I already tried using ChatGPT, Canva, Adobe, Gemini but still the output doesn't match the original one generated by claude.

Anyone knows of any free tools which can be used to do this ? (I don't want to sign up and create an account to access this tool)