OpenAI's Vaibhav Srivastav details GPT-5.6 Sol's tiered reasoning settings ranging from Light to Ultra

Reasoning efforts on GPT-5.6 Sol: Start with the lowest setting that gets the job done, then turn it up only when the task actually needs more thinking. > Light & Low: quick, well-scoped tasks > Medium: planning, analysis, or a few moving parts > High & xhigh: harder work with… Show more

Ok, I take the naming thing back, this is just as opaque and convoluted as ever (functionality is fine to desirable tho). Never change oai https://twitter.com/reach_vb/status/2075489301253488778

One of the most confusing aspects of GPT-5.6 is figuring out which model to use at which reasoning effort - sounds like Sol on Medium might be a good new default for coding work, if it's an upgrade from my previous favorite 5.5 xhigh… Show more

I recommend using GPT-5.6 Sol Medium as your daily driver, and for really hard problems to switch to Extra High. If you want the absolute best and are not afraid to burn usage fast, then Ultra is a beast.