AI BriefingOpenAI Codex Restricts Mentions of Animals
·2026.04.29 07:02
Key point
OpenAI Codex's GPT-5.5 instructions include a rule to avoid mentioning unrelated animals or creatures.
Details
The base_instructions for GPT-5.5 in OpenAI Codex contain a rule stating that animals or creatures such as goblin, gremlin, raccoon, troll, ogre, and pigeon should only be mentioned when absolutely and clearly relevant to the user's question.
This text was introduced by Simon Willison, who quoted it on April 28, 2026, from the instructions found in models.json in the Codex repository.
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