Fable Exhibits Two Distinct Failure Modes
PandaAshwinee · x · 2026-07-10
Referencing a previous discussion, the post highlights two Fable failure modes: first, completely ignoring the prompt and outputting no text; second, failing to answer given target instructions and instead corrupting markdown files.
The author adds that they assumed Anthropic could monitor Fable's CoT, which is why these issues went undetected. The core focus is on analyzing model behavior and failure modes.
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