---
language: en
license: other
task_categories:
- text-classification
tags:
- ai-detection
- reddit
- human-written
- nlp
size_categories:
- 10K<n<100K
configs:
- config_name: default
  data_files:
  - split: pre_2022
    path: data/pre_2022-*
  - split: post_2022
    path: data/post_2022-*
dataset_info:
  features:
  - name: text
    dtype: large_string
  - name: subreddit
    dtype: large_string
  - name: domain
    dtype: large_string
  - name: post_type
    dtype: large_string
  - name: year
    dtype: int64
  - name: word_count
    dtype: int64
  - name: length_bin
    dtype: large_string
  - name: score
    dtype: int64
  - name: created_utc
    dtype: int64
  - name: id
    dtype: large_string
  splits:
  - name: pre_2022
    num_bytes: 14860525
    num_examples: 19960
  - name: post_2022
    num_bytes: 13977964
    num_examples: 19985
  download_size: 16462550
  dataset_size: 28838489
---

# Reddit AI-Detection Dataset

Human-written Reddit posts and comments collected for AI-generated text
detection research (CSCI 544 – *Who Wrote This?*).

All records in the **pre-2022** split pre-date widespread LLM deployment
and can be treated as ground-truth human-authored text for detector
calibration.

## Splits

| File | Records | Period |
|------|--------:|--------|
| `data/reddit_pre_2022.zip` | 2,257 | 2005 – 2021 |
| `data/reddit_post_2022.zip` | 79 | 2022 – 2026 |
| `data/reddit_combined.zip` | 2,336 | 2005 – 2026 |

## Schema

| Column | Type | Description |
|--------|------|-------------|
| `text` | str | Post / comment body |
| `subreddit` | str | Source subreddit |
| `domain` | str | technology · news · science · finance · entertainment |
| `post_type` | str | `submission` or `comment` |
| `year` | int | UTC year of posting |
| `word_count` | int | Approximate word count |
| `length_bin` | str | short / medium / long / very_long |
| `score` | int | Reddit score at collection time |
| `created_utc` | int | Unix timestamp |
| `id` | str | Reddit post ID |

## Citation

Data originally collected by Pushshift / u/raiderbdev, packaged by u/Watchful1.