AI Text Detection Response

The Copyleaks AI Content Detection API returns a comprehensive response that includes classification results, per-section probability values, and detailed explanations of the AI detection analysis. This response structure provides both high-level insights and granular details about detected AI-generated content patterns.

Response Properties

string

The version of the AI detection model used (e.g., “v9.0”).

array<object>

An array of classification results for different sections of the text.

array[object]

An array of all the classifications. The sections contain their position, classification and the probability for that classification.

Show result item properties

integer

Indicates the text classification.Available Options:

1 - Human
2 - AI Generated Text

number<float>

The classification confidence. Deprecated - we plan to remove this value by July 2026.

array[object]

Provides information about the match objects that have been found in the text.

Show match properties

object

Describes the text positions for the result (textual version).

Show text properties

object

Positions of the characters in that specific result.

Show chars properties

array[integer]

Character match start positions.

array[integer]

Character match lengths.

object

Positions of the words in that specific result.

Show words properties

array[integer]

Words match start positions.

array[integer]

Words match lengths.

object

Describes the text positions for the result (html version). Default: null.

Show html properties

object

Show chars properties

array[integer]

Character match start positions.

array[integer]

Character match lengths.

array[integer]

Group identifiers associated with each word.

object

Show words properties

array[integer]

Words match start positions.

array[integer]

Words match lengths.

array[integer]

Group identifiers associated with each word.

object

Aggregated detection results.

Show summary properties

number<float>

Indicates the confidence in which this text was written by a human.

number<float>

Indicates the confidence in which this text was written by AI.

object

Metadata about the scan.

Show scannedDocument properties

string

The unique scan id provided by you.

integer

Unsigned Integer. Total number of words found in the scanned text.

integer

Unsigned Integer. Number of excluded words in the submitted content.

integer

Overall credits used for the scan.

string<date-time>

The creation time of the scan. Timezone: UTC+0.

object

Show metadata properties

string<uri>

The submitted url after all http redirects.

string<uri>

Extracted canonical url from the scanned document.

string<date-time>

Publication date of the scanned document.

string<date-time>

Creation date of the scanned document.

string<date-time>

Last modification date of the scanned document.

string

Scanned document author.

string

Scanned document organization.

string

Scanned document filename.

Example Response

{
  "modelVersion": "v9.0",
  "results": [
    {
      "classification": 2,
      "probability": 0.7316979,
      "matches": [
        {
          "text": {
            "chars": {
              "starts": [0],
              "lengths": [554]
            },
            "words": {
              "starts": [0],
              "lengths": [73]
            }
          }
        }
      ]
    }
  ],
  "summary": {
    "human": 0.0,
    "ai": 1.0
  },
  "scannedDocument": {
    "scanId": "scan-id",
    "totalWords": 73,
    "totalExcluded": 0,
    "credits": 1,
    "expectedCredits": 1,
    "creationTime": "2025-08-10T08:33:05.22225Z"
  },
  "explain": {
    "patterns": {
      "statistics": {
        "aiCount": [1.2066389, 9.673915, 34.41001],
        "humanCount": [0.18481831, 0.13894142, 0.33555666],
        "proportion": [6.5287843, 69.625854, 102.54607],
        "source": [1, 1, 1]
      },
      "text": {
        "chars": {
          "starts": [10, 96, 136],
          "lengths": [25, 33, 33]
        },
        "words": {
          "starts": [1, 12, 17],
          "lengths": [4, 4, 5]
        }
      }
    }
  }
}

Classification Codes

Code	Classification	Description
1	Human	Content is likely written by a human
2	AI-generated	Content is likely generated by artificial intelligence

Next Steps

AI Content Detection Guide

Learn how to use the AI Content Detection API to identify AI-generated text.

AI Detection API Reference

Explore the complete API reference for AI content detection.

AI Logic Feature

Understand how AI Logic provides transparency in AI detection results.

Reference

Actions

Data Types

Response Properties

Example Response

Classification Codes

Next Steps

AI Content Detection Guide

AI Detection API Reference

AI Logic Feature

​Response Properties

​Example Response

​Classification Codes

​Next Steps

AI Content Detection Guide

AI Detection API Reference

AI Logic Feature

Response Properties

Example Response

Classification Codes

Next Steps