- Anthropic has released Fable 5, a Mythos-class model it previously kept private because of safety concerns about its advanced capabilities.
- Researchers pushed back after a buried safety rule showed the model silently downgraded requests related to frontier AI work; Anthropic apologized for the lack of transparency.
- The company will now show when it downgrades requests (falling back to Opus 4.8 and returning a refusal reason), citing national-security limits and its terms of service — a shift that comes amid Pentagon tensions and an IPO filing.
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