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Z.ai: GLM 5.3 vs Anthropic: Claude Opus 5.5

Z.ai: GLM 5.3 and Anthropic: Claude Opus 5.5 are both reasoning models. This page compares the specs we have. It does not declare a quality winner — Arena and Artificial Analysis keep those numbers.

Z.ai: GLM 5.3 lessonAnthropic: Claude Opus 5.5 lessonTest side by side

Live specs

Z.ai: GLM 5.3Anthropic: Claude Opus 5.5
Typereasoningreasoning
Input$0.070 / M$4 / M
Output$1.4 / M$20 / M
Context1.0M1.0M
Inputstexttext, image, file
Toolsyesyes
Weightsopenunverified

PickZ.ai: GLM 5.3 if

  • input price matters. Z.ai: GLM 5.3 lists $0.070 / M in
  • the input is long. Z.ai: GLM 5.3 lists 1.0M context
  • you need weights you can download

PickAnthropic: Claude Opus 5.5 if

  • the input includes images

Saved runs

No public playground runs include both models yet.