Models

GPT-5.6 Sol Pro

OpenAI · July 2026

GPT-5.6 Sol set to do more work on every answer, for hard problems and long multi-step work where a slower, costlier reply is worth it. Reads images and documents, with a 1M-token context.

Superseded by GPT-6 Sol Pro →

  • Modalities

  • Context window

    1,050,000 tokens, ≈ 788,000 words · about 3,150 pages

  • Max output

    128,000 tokens, ≈ 96,000 words in a single answer

  • Knowledge cutoff

    February 2026

Reasoning effort

Default: Medium

  • None

  • Low

  • Medium

  • High

  • X-High

  • Max

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
  • File searchSupported
  • Image generationSupported
  • Code interpreterSupported
  • Hosted shellSupported
  • Apply patchSupported
  • SkillsSupported
  • Computer useSupported
  • MCPSupported
  • Tool searchSupported

Features

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

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