Hosted tool 'web_search_preview' is not supported

[endolith]

My first attempt at using PyGPT, I added an OpenAI API key, and chose gpt-4.1-nano, and got this error.

Error code: 400 - {'error': {'message': "Hosted tool 'web_search_preview' is not supported with gpt-4.1-nano.", 'type': 'invalid_request_error', 'param': 'tools', 'code': None}}

I'm guessing this is some tool that's turned on? But I don't know what. How do I turn it off?

[endolith]

Found it. It's just the web search icon: