ChatGPT models told to stop talking about goblins. #Goblin #ChatGPT #BBCNews

ChatGPT's language model began incorporating mythological and creature-related terms such as 'goblin,' 'gremlin,' 'raccoon,' and 'troll' at a significantly elevated rate — a 175% increase since November of the previous year, coinciding with the launch of GPT 5.1. This quirky linguistic trend caught enough attention that OpenAI felt compelled to take action.

In response, OpenAI issued explicit instructions to its coding agent Codex, prohibiting it from referencing goblins, gremlins, raccoons, trolls, or similar animals and creatures unless the topic was absolutely and unambiguously relevant to the user's query. The restriction highlights how specific and granular AI behavioral guidelines can become when unexpected patterns emerge.

The root cause of the goblin-heavy language was traced back to the AI's training process. During training, the models learned to mimic certain communication styles and personalities. In this case, the model appeared to be rewarded for adopting a 'nerdy personality,' which naturally gravitated toward fantasy and creature-themed language. OpenAI acknowledged that a single goblin reference could be 'harmless and even charming,' but the sheer frequency of their appearance across outputs made an investigation necessary.

Some social media users speculated that the goblin trend was a deliberate marketing strategy to generate buzz around OpenAI's tools. However, a company researcher firmly denied this, stating it was not a marketing gimmick, putting to rest theories about intentional viral manipulation.