SVG生成で使用できる推論 effort の値は何ですか？

{
  "model": "gpt-image-2.6-sunburst",
  "prompt": "A minimal flat vector icon of a rocket, exactly three solid colors, geometric editable shapes, no text, no raster texture, transparent background.",
  "output_format": "svg",
  "svg": {
    "model": "gpt-5.6-terra",
    "reasoning": { "effort": "high" }
  },
  "quality": "low",
  "size": "1024x1024",
  "n": 1
}

{
  "error": {
    "message": "Unsupported value: 'minimal' is not supported with the 'gpt-5.6-terra' model. Supported values are: 'none', 'low', 'medium', 'high', 'xhigh', and 'max'.",
    "localized_message": "Unknown error",
    "type": "shell_api_error",
    "param": "",
    "code": "unsupported_value"
  }
}

{
  "error": {
    "message": "Provider API error: Invalid value: 'ultra'. Supported values are: 'none', 'minimal', 'low', 'medium', 'high', 'xhigh', and 'max'.",
    "localized_message": "Unknown error",
    "type": "shell_api_error",
    "param": "svg.reasoning.effort",
    "code": "invalid_value"
  }
}

{
  "error": {
    "message": "Unsupported parameter: 'reasoning.effort' is not supported with this model.",
    "localized_message": "Unknown error",
    "type": "shell_api_error",
    "param": "",
    "code": "unsupported_parameter"
  }
}

{
  "model": "gpt-image-2.6-sunburst",
  "prompt": "A minimal flat vector icon of a single blue circle, two solid colors, geometric shapes, no text, transparent background.",
  "output_format": "svg",
  "svg": {
    "model": "gpt-5-nano",
    "reasoning": { "effort": "minimal" }
  },
  "quality": "low",
  "size": "1024x1024",
  "n": 1
}