Recent patterns of frequent minor incidents at OpenAI, including elevated error rates affecting ChatGPT conversations, logins, Thinking mode, and image generation, primarily drive the closely matched market odds around 1–3 outage days for September 2026. Data from status trackers show dozens of short-duration events (often under four hours) across recent months, tied to high usage scaling, configuration changes, and infrastructure strain on large language model services, even as baseline uptime trends improve modestly. Traders weigh OpenAI’s rapid mitigations and historical averages of several disrupted days per month against the possibility of fewer issues from ongoing reliability investments or a spike from new model rollouts. The tight spread between low single-digit outcomes reflects uncertainty over exact thresholds for what qualifies as an outage day amid mostly partial disruptions.