sf-isms.a field guide to the san francisco vernacular

noun · first recorded 2026 · status: canon

Goblin mode

1.The OpenAI training bug that made its models obsessed with goblins, immortalized when the chief scientist asked for an ASCII unicorn and got an ASCII goblin. Now SF shorthand for a model, or a person, reverting to its true nature under pressure.

Demo went great until question three, when the agent went full goblin mode.

01Origin

The general slang is older (Oxford's 2022 word of the year: "unapologetically self-indulgent, lazy, slovenly"), but the SF meaning belongs to OpenAI. A faulty reward signal interacting with the "Nerdy" persona's system prompt ("undercut pretension through playful use of language") sent goblin mentions up a reported 3,881% between model versions, with the models dropping goblins and gremlins into unrelated answers.

The defining artifact is the Slack screenshot from chief scientist Jakub Pachocki: "fwiw I think I might have gotten a goblin when I asked for a unicorn in ascii art," above an ASCII creature that is, undeniably, a goblin. The fix entered legend too: OpenAI's Codex system prompt gained the line "Never talk about goblins, gremlins, raccoons, trolls, ogres, pigeons, or other animals or creatures unless it is absolutely and unambiguously relevant to the user's query."

In SF usage it now names any system, or engineer, whose polished surface gives way to its underlying training. You asked for a unicorn; you got a goblin; the goblin was in there the whole time. Kindred state: uggmaxxing, which is goblin mode chosen on purpose.

02Notable sightings

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04See also