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Update: Anthropic came to their senses and walked back their policy of dumbing down Fable 5 and hiding this behavior. -> simonwillison.net/2026/Jun/11/... h/t @simonwillison.net
Anthropic Walks Back Policy That Could Have ‘Sabotaged’ AI Researchers Using Claude. Big scoop for Maxwell Zeff at Wired: “We’re changing Fable 5’s safeguards for frontier LLM development to make them visible.” Anthropic said in a statement to WIRED. “We made the wrong tradeoff and we apologize for not getting the balance right.” There's been a huge outcry about Anthropic's policy, tucked away in their system card, that Claude Fable/Mythos would identify "requests targeting frontier LLM development" and "limit effectiveness" without notifying the user. It's very good news that they're dropping this. Posted 11th June 2026 at 3:45 am
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at://did:web:fry69.dev/app.bsky.feed.post/3mnw4qy3azk2t
at://did:web:fry69.dev/app.bsky.feed.post/3mnw4qy3azk2t
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https://simonwillison.net/2026/Jun/11/anthropic-walks-back-policy/
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