What is known, what is inferred. This lesson sits inside Module I — The paradigm — of Reasoning Models, the course that anchors the Advanced AI Research program. It is not a survey; it is the specific, working understanding of "o1, o3, and the reasoning family" that the rest of the course assumes you carry forward.
- 01Define o1, o3, and the reasoning family in the precise sense used across Reasoning Models.
- 02Recognize when o1, o3, and the reasoning family is the correct lens for the situation in front of you, and when it is not.
- 03Apply o1, o3, and the reasoning family to a concrete case drawn from The paradigm, and defend the result in plain language.
- 04Connect o1, o3, and the reasoning family to the adjacent lessons in this module without collapsing the distinctions between them.
The idea, stated plainly
What is known, what is inferred. That single sentence is the whole lesson in compressed form. The rest of the reading unfolds it — what it means when the terms are taken seriously, where it comes from, and what work it does inside Reasoning Models. Read the sentence, then read it again after the sections below; it should carry more weight the second time.
Why it belongs in The paradigm
Module I exists because the shift. "o1, o3, and the reasoning family" is one of the pillars of that module: without it, the later lessons either become memorization or lose their bite. Notice which earlier lessons this one leans on, and which later lessons will lean on it — the shape of the module is easier to see once you place this piece.
How the School of Artificial Intelligence faculty use it
In practice, working school of artificial intelligence professionals reach for this idea before they reach for a formula or a tool. It is a way of framing the problem so that the right question comes first. The mark of understanding is not that you can recite o1, o3, and the reasoning family; it is that you catch yourself using it, unprompted, when the situation calls for it.
Common misreadings
The most frequent error is to treat o1, o3, and the reasoning family as a slogan and skip the mechanics. The second most frequent is the opposite — treating the mechanics as the point, when the mechanics are only there to make the idea usable. Both errors collapse the same distinction, and both are correctable by returning to the one-line summary and asking what it actually claims.
- o1, o3, and the reasoning family is a working tool, not a slogan.
- Its meaning is set by the module it lives in: The paradigm.
- Understanding is demonstrated by unprompted use in the correct situation.
- The adjacent lessons in this module are its natural context; read them together.
- 503 — Reasoning Models, Module I: The paradigm — The parent module for this lesson. Re-read the module blurb after finishing the lesson.
- The Anabasis Academy — School of Artificial Intelligence, Advanced AI Research — The wider program this lesson serves; the Certificate in Advanced AI Research (Expert tier). Admission requires the AI Foundations and AI Engineering certificates or the equivalent in industry. credential ultimately certifies mastery of ideas like this one.