Models

Grok 4.3

xAI · May 2026

A fast all-rounder for chat, code and hard problems. Reads longer documents than 4.5, but isn't built for long multi-step jobs.

Superseded by Grok 4.5 →

  • Modalities

  • Context window

    1,000,000 tokens, ≈ 750,000 words · about 3,000 pages

Reasoning effort

Default: Low

  • None

  • Low

  • Medium

  • High

  • X-High

Providers

Files you can attach

  • ImagesJPG, PNG
  • DocumentsNot supported
  • 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 generationSupported
  • Code interpreterSupported
  • Hosted shellSupported
  • Apply patchNot supported
  • SkillsNot supported
  • Computer useNot supported
  • Tool searchNot supported

Features

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

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