OpenAI’s GPT-5.4 Pro and GPT-5.5 variants have already posted 43–44.3% accuracy on Humanity’s Last Exam, a 2,500-question benchmark of expert-level problems across math, science, and the humanities created to resist rapid saturation. These results, achieved through March and April 2026, reflect continued scaling, improved reasoning chains, and targeted post-training that closed much of the gap with Google’s leading Gemini 3.1 Pro Preview. Traders are watching for any June release or high-compute run that could push an official GPT model past the next performance threshold before the 30 June cutoff, while noting that benchmark gains often arrive in uneven bursts rather than steady linear progress.
Experimental AI-generated summary referencing Polymarket data. This is not trading advice and plays no role in how this market resolves. · Updated$23,124 Vol.
50%+
27%
$23,124 Vol.
50%+
27%
The resolution source will be the official Humanity’s Last Exam leaderboard https://scale.com/leaderboard/humanitys_last_exam.
Market Opened: Jan 30, 2026, 12:00 AM ET
Resolver
0x65070BE91...The resolution source will be the official Humanity’s Last Exam leaderboard https://scale.com/leaderboard/humanitys_last_exam.
Resolver
0x65070BE91...OpenAI’s GPT-5.4 Pro and GPT-5.5 variants have already posted 43–44.3% accuracy on Humanity’s Last Exam, a 2,500-question benchmark of expert-level problems across math, science, and the humanities created to resist rapid saturation. These results, achieved through March and April 2026, reflect continued scaling, improved reasoning chains, and targeted post-training that closed much of the gap with Google’s leading Gemini 3.1 Pro Preview. Traders are watching for any June release or high-compute run that could push an official GPT model past the next performance threshold before the 30 June cutoff, while noting that benchmark gains often arrive in uneven bursts rather than steady linear progress.
Experimental AI-generated summary referencing Polymarket data. This is not trading advice and plays no role in how this market resolves. · Updated

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