Models

o3

OpenAI · April 2025

A reasoning model that works through problems step by step. Built for hard problems, not chat or code.

Use instead GPT-5.6 Sol →

  • Modalities

  • Context window

    200,000 tokens, ≈ 150,000 words · about 600 pages

  • Max output

    100,000 tokens, ≈ 75,000 words in a single answer

  • Knowledge cutoff

    June 2024

Reasoning effort

  • Low

  • Medium

  • High

Providers

Files you can attach

  • ImagesJPG, PNG, GIF, WEBP
  • DocumentsPDF, DOCX, XLSX, PPTX
  • Text and codeTXT, MD, CSV, TSV, RPT, LOG, PY, TS, TSX, JS, JSX, CS, GO, JAVA, KT, SWIFT, CPP, C, H, PHP, RB, SQL, SH, PS1, HTML, CSS, SCSS, JSON, YAML, YML, XML, INI

Tools

  • Web searchSupported
  • Image generationNot supported
  • Hosted shellNot supported
  • Apply patchNot supported
  • Tool searchNot supported

Features

  • StreamingSupported
  • Function callingSupported
  • Structured outputsSupported
  • Fine-tuningNot supported

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