AI Expert

Building OpenAI o1

3 minutesIntermediateBuilderOpenAIPrompt Engineering

OpenAI. This three-minute first-party video records how the OpenAI team presented o1 at launch. It is useful for understanding the category's history, but it does not establish how current models work internally or which prompting pattern will perform best on a different provider or task.

AI Expert note

Keep this as historical source material, not as current implementation guidance or proof of a private reasoning process. Base production choices on current provider documentation, representative evaluations and checkable output evidence.

What you should get from this

See the original o1 launch framing and separate that historical account from current implementation guidance.

Watch or know first

Watch the primary pick first or read the companion article's reasoning-model section.

Last reviewed: Aug 11, 2026

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