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ChatGPT's 0-5 NFL debut logs a 5.23-unit loss as Week 2 brings a model upgrade

9/18/2026

An NFL betting experiment pitting human writer Dan against ChatGPT opened with a clear verdict in Week 1: Dan went 3-2 and gained 0.99 units while ChatGPT finished 0-5 and lost 5.23 units.

The contest resumes in Week 2 with ChatGPT running on GPT-6 Pro, powered by GPT-6 Astra, an upgrade from the GPT-5.6 Sol with max reasoning version that produced the debut card.

Each participant works from the same odds board each week, sizes each wager to win one unit, and cannot select a bet priced worse than -120. Week 1 breakdown ChatGPT's five losses came across different bet types.

Detroit won outright but failed to cover. Houston, Los Angeles, and Green Bay all lost outright. The Buccaneers-Bengals game went over the total.

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