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o3 Mini High

by OpenAIReleased 12 February 2025

o3-mini-high is o3-mini with its thinking effort fixed at high, so you never set the dial yourself. It reads text and files, not pictures, and writes text, keeping about 200 pages in mind at once. It is for math, science and coding problems where the model should think as hard as it can, and it can call functions and fill in the exact form you give it.

TakesTextFiles
GivesText

Reads about 200 pages · writes up to 100 pages

Parameters you can send

Standard OpenAI fields, grouped by what they control. Anything not listed is accepted and ignored.

Shaping the reply

How long, how varied, where to stop.

max_tokensseed

Reasoning

Let it think before answering — and see the thinking.

reasoningreasoning_effortinclude_reasoning

Structured output

Get JSON you can parse instead of prose.

response_formatstructured_outputs

Tools

Let the model call your functions.

toolstool_choice

Questions about o3 Mini High

  • Is o3 Mini High still on sale?

    No. OpenAI has retired it. Other OpenAI models are on sale.

  • What is o3 Mini High best for?

    o3-mini-high is o3-mini with its thinking effort fixed at high, so you never set the dial yourself. It reads text and files, not pictures, and writes text, keeping about 200 pages in mind at once. It is for math, science and coding problems where the model should think as hard as it can, and it can call functions and fill in the exact form you give it.

  • Does o3 Mini High work in Arabic, French or Darja?

    OpenAI names no languages for o3 Mini High. Arabic, French and Darja: not stated.

  • Can it read PDFs, images or a whole book?

    It reads text and PDFs. Up to 200K tokens in one request, about 200 pages. It writes up to 75 000 words at once.

  • Is o3 Mini High open source?

    No. OpenAI has not published its weights.

  • Who makes o3 Mini High, and when was it released?

    OpenAI. Released 12 February 2025. It knows the world up to 31 October 2023.

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