Tech Apr 30, 2026 8 min OpenAI slayed the goblins that infested GPT-5.5 OpenAI published a full investigation into why GPT-5.1+ kept inserting goblin and gremlin metaphors, tracing the cause from a Nerdy persona's reward signal through SFT data contamination to a Codex developer prompt suppression. OpenAI LLM Codex 強化学習 AI安全性
