Custom GPT can't open webpage when GPT4 on chat.openai.com can, 'open_url' is not defined

Hi there,

I created a Custom GPT with settings “Web browsing” and “Code interpreter” enabled. I published it.

When I give it a URL to analyze, it will call Bing, make a slightly related query, and use that query results instead of actually visiting the URL page and using the content there.

When I give the same URL to GPT4 in chat.openai.com, the URL is being fetched and the contents accessed (which I can tell by the chatGPT giving me information that cannot be guessed just by the URL structure).

How is it so?

If I try again in my Custom GPT, while editing it in Preview mode, this is the error that comes up:

# I'll use the browser tool to fetch the contents of the provided link.
open_url("https://theURLiWantMyCustomGPTtoBrowse.com/?someparameters")
---------------------------------------------------------------------------
NameError                                 Traceback (most recent call last)
Cell In[1], line 2
      1 # I'll use the browser tool to fetch the contents of the provided link.
----> 2 open_url("https://theURLiWantMyCustomGPTtoBrowse.com/?someparameters")

NameError: name 'open_url' is not defined

I’m having a similar issue with code interpreter and browsing enabled on a custom gpt, and since the link i want it to use is inside a csv file (2.4mb) it uses interpreter first and then says it can’t browse the web.