Models

GPT-5 Pro

OpenAI · October 2025

Thinks hard on every question, with no dial to turn it down. Built for hard problems, not chat or code, and can write very long answers.

Superseded by GPT-5.2 Pro →

  • Modalities

  • Context window

    400,000 tokens, ≈ 300,000 words · about 1,200 pages

  • Max output

    272,000 tokens, ≈ 204,000 words in a single answer

  • Knowledge cutoff

    September 2024

Reasoning effort

Default: High

  • 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

Features

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

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