Update 2025-08-07 (PST) (AI summary of creator comment): The market will resolve based on the maximum input size allowed across all tiers on the GPT-5 website interface - specifically how large of a prompt users can enter into the input window.
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@DZC I brought it up but didn't see much discussion. https://discord.com/channels/915138780216823849/1403885354603515945
yea, somewhere between around 64k it calls quits. definitely <<124k
@Donald im gonna call bs on this resolution. clarifying the definition day of, then buying up NO to make yourself the most successful trader on the market seems a bit biased. I probably wouldn't even accept N/A given how clear the market title and GPT5 model spec is (even for mini and nano). am i missing something?
@DZC i clarified this before the release of the model, then waited until 1 day after the release of the model on this. anyone could have actually tried figuring this out in the mean time. there is no issue here that i can see. can you be more specific on why you think this?
@DZC in fact, no matter how you interpret the question (even going after context size, not - as clearly stated in the question - input size) the question is correctly resolved as no, since the maximum context size (for gpt5 pro) is 128k, which is not >128k.
@Donald
I'm confused. You didn't specify "through ChatGPT" until after everyone had already bet.
https://openai.com/gpt-5/ says

@Donald This is pretty confusing, most people think of input size as the token context. Would you be open to N/A resolution due to this confusion?