Use ZCode with Pareto.

Settings → Model settings → Add provider → Create custom provider. Use Chat completions, the Pareto base URL, and model z-ai/glm-5.3-flash. Clear Image, Video and PDF, and paste this into the model's Reasoning parameter mapping. The default mapping sends fields Pareto rejects.

{
  "reasoning_effort": reasoningLevel == "disabled" ? "none" : reasoningLevel == "enabled" ? "high" : reasoningLevel
}