AI Text Detection Response

The Copyleaks AI Text 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., “v11.0”).

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>

The share of the text’s words classified as human-written, from 0 to 1.

number<float>

The AI score: the share of the text’s words classified as AI-generated, from 0 to 1.

object

Metadata about the scan.

Show scannedDocument properties

string

The unique scan id provided by you.

integer

Total number of words found in the scanned text.

integer

Number of excluded words in the submitted content.

integer

The number of credits consumed by the scan.

integer

The number of credits the scan was expected to cost.

string<date-time>

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

Example Response

{
  "modelVersion": "v11.0",
  "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,
    "actualCredits": 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 Text Detection Guide

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

AI Text Detection API Reference

Explore the complete API reference for AI Text 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 Text Detection Guide

AI Text Detection API Reference

AI Logic Feature

​Response Properties

​Example Response

​Classification Codes

​Next Steps

AI Text Detection Guide

AI Text Detection API Reference

AI Logic Feature

Response Properties

Example Response

Classification Codes

Next Steps