# Tests reveal that ChatGPT-5 hallucinates less than GPT-4o did – and Grok is still the king of making stuff up

> ChatGPT 5 scores a low 1. 4% on the Hallucination Leaderboard This puts it ahead of ChatGPT-4 which scores 1. 8% and GPT-4o, which scores 1.

- **Source:** [TechRadar](https://www.techradar.com/ai-platforms-assistants/tests-reveal-that-chatgpt-5-hallucinates-less-than-gpt-4o-did-and-grok-is-still-the-king-of-making-stuff-up?utm_source=gearopen.com&utm_medium=referral&utm_campaign=feed&utm_content=6899e307b51188f4ee84fc08)
- **Published:** 2025-08-11
- **Category:** AI & Bots
- **Tags:** #chatgpt #openai #gemini #scores #grok #hallucinates #king #less
- **Canonical:** http://localhost:4321/a/6899e307b51188f4ee84fc08

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_GearOpen's distilled summary. The full original article is published at TechRadar (source link above); GearOpen does not republish the source's full text._