Chat with GLM 5.3.

The full-size GLM 5.3, larger and more careful than the Flash version this page opens with. Built for long pieces of software work that run over many steps.

Start chatting with GLM 5.3 now — free, no account

At a glance

  • Maker: Z.ai
  • Active parameters: 753B
  • Context window: 1M
  • Size: Very large
  • Memory: Handles very long documents
  • Good at: Coding and long, multi-step work
  • Supports: tools, zero data retention

Model availability changes as upstream capacity comes and goes — the picker on the chat page shows what is ready right now.

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