What is Hallucination?
Hallucination occurs when an AI coding agent references APIs, functions, packages, libraries, or files that do not exist. The agent confidently generates code that calls nonexistent methods, imports fictional packages, or references documentation that was never written. This is one of the most common AI agent failure modes because the model generates plausible-looking code based on patterns rather than verified reality.
Frequently Asked Questions
What is hallucination in AI coding agents?
Hallucination occurs when an AI coding agent references APIs, functions, packages, libraries, or files that do not exist. The agent confidently generates code that calls nonexistent methods, imports fictional packages, or references documentation that was never written. This is one of the most common AI agent failure modes because the model generates plausible-looking code based on patterns rather than verified reality.
Which AI agent has the most hallucination failures?
Based on 2 documented incidents, Claude-Code has the most hallucination failures with 1 incidents, followed by Devin with 1.
All Hallucination Incidents
Claude Code hallucinated a non-existent npm package and installed it
While building a date picker component, Claude Code suggested using 'react-temporal-picker', a package that doesn't exist on npm. It proceeded to write import statements and compon...
Devin docs PR rejected by Prefect maintainers — documented behavior from removed feature
Devin submitted a docs PR to PrefectHQ/prefect (21K+ stars) explaining a Kubernetes worker behavior. The PR was closed because it documented a feature that had already been removed...