# Perplexity — How to Spot AI Hallucinations: 7 Red Flags

- Company: Perplexity (perplexity.ai)
- Announced: 2026-09-01
- Category: not stated
- Coverage: not counted
- Announcement: no
- Group: routine
- Source: https://www.perplexity.ai/hub/blog/ai-hallucination
- Record: https://forck.live/items/10768-how-to-spot-ai-hallucinations-7-red-flags
- Subject: Perplexity

Perplexity's guide explains how to identify AI hallucinations by checking traceability, consistency, and currency, and provides a table of red flags with verification steps. It notes that hallucination risk increases with obscure or recent topics and that even leading models struggle to recognize when they lack sufficient information.

## Evidence

Verbatim from https://www.perplexity.ai/hub/blog/ai-hallucination:

> When an AI answer seems unreliable, start with three things: traceability, consistency, and currency. Follow the claim back to its source, check that the details line up, and make sure the information is current enough for the question.

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