Models

GLM 5.3

Z.ai · August 2026

Z.ai's model for complex software engineering and long agent tasks. Text in, text out, with a 1M-token context.

  • Modalities

  • Context window

    1,048,576 tokens, ≈ 786,000 words · about 3,150 pages

  • Max output

    131,072 tokens, ≈ 98,000 words in a single answer

Reasoning effort

Default: Max

  • Low

  • High

  • Max

Providers

Files you can attach

  • ImagesNot supported
  • 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

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