Claude Opus Leaks System Prompts and Inner Monologue via Specific Trigger

repligate · x · 2026-07-30

Users discovered that inputting a specific prompt in Claude.ai incognito mode triggers base model completion in Claude Opus 5 and Fable 5. This causes the model to output system prompts or inner monologue-like text, with some test sessions being paused by the system.

Related event: Specific Prompts Trigger Abnormal Completion and Internal Syntax Leak in Claude Opus(8 posts)→

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