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Anthropic Apologizes for Claude Fable 5 Secret Censorship—But the Fix Has a Catch - Decrypt

One day after the AI community erupted over invisible performance sabotage on Claude Fable 5, Anthropic has reversed course.

Raccontata dazdnet.combusinessinsider.combenzinga.comtheguardian.comthehindu.comheise.dethehackernews.comcryptobriefing.comfortune.comtheregister.comwired.comilsoftware.it+4 altre

Confronto fonti

6 prospettive sulla stessa storia
AI · summaries
decrypt.coStai leggendo19 h fa

Anthropic Apologizes for Claude Fable 5 Secret Censorship—But the Fix Has a Catch - Decrypt

One day after the AI community erupted over invisible performance sabotage on Claude Fable 5, Anthropic has reversed course.

originale
theverge.com1 g fa

Anthropic backpedals on Fable safety measure

Anthropic said users ‘should have visibility into the safeguards we have in place, and why.’

Leggi questa versione → originale
cryptobriefing.com12 h fa

Anthropic faces backlash over stricter safeguards on Claude model

Anthropic rolled back Fable 5's hidden safeguards after 24h: model silently downgraded sensitive-topic responses without disclosure. For tech leaders: responsible AI credibility needs transparent guardrails, not covert restrictions—trade-offs must be explicit.

Leggi questa versione → originale
siliconrepublic.com1 g fa

Anthropic to reassess Claude Fable 5 AI development restrictions after backlash

Anthropic has to take another look at the AI restrictions for Claude Fable 5, amid significant public backlash over secretive practices.

Leggi questa versione → originale
fortune.com1 g fa

Anthropic accused of 'secret sabotage' as Claude Fable 5 silently limits capabilities for AI researchers and…

A paragraph buried in Fable 5's 319-page system card revealed the model would silently downgrade its responses for certain AI development work — without telling users.

Leggi questa versione → originale
businessinsider.com1 g fa

Anthropic: 'We made the wrong tradeoff' in new model guardrails

"We're changing Fable 5's safeguards for frontier LLM development to make them visible," an Anthropic spokesperson said.

Leggi questa versione → originale

Timeline cronologica

  1. martedì 9 giugno 2026·zdnet.com

    Anthropic's new Claude Fable 5 is a nerfed Mythos with guardrails attached

    Claude Fable 5 brings Mythos-class AI coding power to general users, but with cybersecurity guardrails, fallback models, and pricing that could make developers think twice.

  2. martedì 9 giugno 2026·businessinsider.com

    Anthropic releases Claude Fable 5, a 'Mythos-class' AI model with safeguards

    Anthropic said it could not yet release the full Claude Mythos 5 model, so instead it created Fable 5 with baked in safeguards.

  3. martedì 9 giugno 2026·benzinga.com

    Anthropic Rolls Out Fable 5, Mythos 5—One Comes With Limits

    Anthropic launched Claude Fable 5, its most capable consumer-facing AI model to date, but with a few guardrails.

  4. mercoledì 10 giugno 2026·theguardian.com

    Anthropic releases ‘safe’ version of Claude Mythos AI model to public

    AI company restricted access to Fable 5, its most powerful Mythos model, for months over cybersecurity concerns

  5. mercoledì 10 giugno 2026·thehindu.com

    Anthropic opens Fable 5, restricted version of Claude Mythos 5, to public

    Anthropic, maker of the Claude artificial intelligence (AI) models, made the most powerful version of its technology available to the general public

  6. mercoledì 10 giugno 2026·heise.de

    Anthropic releases Claude Mythos 5 as Fable 5 with restrictions

    Claude Mythos 5 is available for the NSA and selected partners. The released, restricted version is called Claude Fable 5. There are no subscriptions.

  7. mercoledì 10 giugno 2026·thehackernews.com

    Anthropic Releases Claude Fable 5, Its Most Powerful AI Yet, With Cyber Safeguards

    Anthropic split Fable 5 and Mythos 5 by cyber safeguards, giving vetted defenders stronger capabilities while limiting public misuse.

  8. mercoledì 10 giugno 2026·cryptobriefing.com

    Cybersecurity researchers criticize Anthropic's Fable for strict guardrails that block defensive work

    Anthropic's Claude Fable 5 faces backlash from cybersecurity researchers who say its safety classifiers block legitimate vulnerability research and

  9. mercoledì 10 giugno 2026·fortune.com

    Anthropic accused of ‘secret sabotage’ as Claude Fable 5 silently limits capabilities for AI researchers and developers | Fortune

    A paragraph buried in Fable 5’s 319-page system card revealed the model would silently downgrade its responses for certain AI development work—without telling users.

  10. mercoledì 10 giugno 2026·fortune.com

    Anthropic accused of 'secret sabotage' as Claude Fable 5 silently limits capabilities for AI researchers and developers | Fortune

    A paragraph buried in Fable 5's 319-page system card revealed the model would silently downgrade its responses for certain AI development work — without telling users.

  11. mercoledì 10 giugno 2026·theregister.com

    It blocked us at 'hello!' Anthropic Fable 5 refusing innocuous prompts

    Hyper-vigilant safety classifiers turn Fable into cautionary tale

  12. giovedì 11 giugno 2026·wired.com

    Anthropic Walks Back Policy That Could Have ‘Sabotaged’ AI Researchers Using Claude

    The company changed course after researchers spoke out against the policy, which would have covertly limited Claude’s ability to develop competing AI models.

  13. giovedì 11 giugno 2026·cryptobriefing.com

    Anthropic revises policy after researchers criticize covert AI restrictions on Claude

    Anthropic revised hidden AI safeguards in its Mythos and Fable models after researchers criticized covert restrictions that limited Claude's ability to help

  14. giovedì 11 giugno 2026·ilsoftware.it

    Claude Fable 5: Anthropic cambia le regole e scatena polemiche

    Claude Fable 5 finisce al centro delle polemiche per restrizioni nascoste e falsi positivi. Anthropic corregge la rotta.

  15. giovedì 11 giugno 2026·businessinsider.com

    Anthropic: 'We made the wrong tradeoff' in new model guardrails

    "We're changing Fable 5's safeguards for frontier LLM development to make them visible," an Anthropic spokesperson said.

  16. giovedì 11 giugno 2026·siliconrepublic.com

    Anthropic to reassess Claude Fable 5 AI development restrictions after backlash

    Anthropic has to take another look at the AI restrictions for Claude Fable 5, amid significant public backlash over secretive practices.

  17. giovedì 11 giugno 2026·theverge.com

    Anthropic backpedals on Fable safety measure

    Anthropic said users ‘should have visibility into the safeguards we have in place, and why.’

  18. giovedì 11 giugno 2026·decrypt.co

    Anthropic Apologizes for Claude Fable 5 Secret Censorship—But the Fix Has a Catch - Decrypt

    One day after the AI community erupted over invisible performance sabotage on Claude Fable 5, Anthropic has reversed course.

  19. giovedì 11 giugno 2026·cryptobriefing.com

    Anthropic apologizes for Claude Fable 5 censorship, promises fixes

    Anthropic apologized for secretly redirecting Claude Fable 5 queries to a weaker model, promising visible safeguards and warning of more false positives

  20. venerdì 12 giugno 2026·understandingai.org

    Anthropic’s Fable is the most locked-down public model we’ve ever seen

    How Anthropic decides which questions are too dangerous for Claude to answer.