ChatGPT making up words

This r/ChatGPT Reddit thread discusses user observations of ChatGPT inventing non-existent words, a behavior rooted in how large language models generate text — by predicting and assembling tokens (sub-word units) probabilistically rather than retrieving factual language. This can occasionally produce fabricated or nonsensical word forms, and is related to broader AI "hallucination" tendencies where the model generates plausible-sounding but inaccurate content.

language slip up??
Has anyone noticed that ChatGPT really latches onto its initial suggestions and then rarely lets those go? No matter how I much I clarified, ChatGPT wouldn’t move off its original recommendation.
Keeps trying to correct me
Is it just me, or is ChatGPT breaking a bit?
ask chatgpt the same prompt and show what you got

Source: r/ChatGPT | 2026-04-13

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