New ‘Woodpecker’ system corrects AI hallucinations

Updated 26th Oct '23

Woodpecker: Correcting AI Hallucinations

Researchers have developed a new system called "Woodpecker" that aims to correct the hallucinations or errors produced by artificial intelligence (AI) models. The Woodpecker system focuses on addressing the problem of AI models generating incorrect or misleading outputs, which can have significant implications in various applications.

Two-Step Process of Woodpecker System

The Woodpecker system utilizes a two-step process to identify and correct AI hallucinations.

Step 1: Detection of Hallucinations

In the first step, it detects the hallucination by comparing the AI-generated output with a reference model or a human-generated ground truth. The system identifies discrepancies between the AI output and the expected result, flagging them as potential hallucinations.

Step 2: Correction of Hallucinations

In the second step, the Woodpecker system corrects the hallucinations by leveraging a technique called "counterfactual learning." It generates alternative outputs that are closer to the ground truth and trains the AI model to recognize and produce these corrected outputs instead of the hallucinations.

Promising Results and Applications

The Woodpecker system has shown promising results in correcting hallucinations in various AI models, including image recognition and natural language processing systems. By addressing the issue of hallucinations, the system aims to improve the reliability and accuracy of AI models, making them more trustworthy and suitable for critical applications.

Further Development and Implementation

It is important to note that the Woodpecker system is a research project, and its implementation and adoption in real-world AI systems may require further development and validation.


  1. Woodpecker: An AI system to correct AI hallucinations
  2. Woodpecker: Detecting and Correcting AI Hallucinations