What is the context window for GPT-4 when using GPTs?

Simple question: what is the context window when creating custom GPTs?

From this thread it looks like it may be < 32k for all GPT-4 not in teams plan? https://twitter.com/aidan_mclau/status/1745145277961396716

It would be good to know exactly what it is so it can be accounted for designing how many tokens to return back from actions.

I.e. we are building https://gpt.videoinsights.ai and it’s important that we know what the upper limit is because it can very easily be hit with long video transcripts.