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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.

Raccontata dadecrypt.cotechcrunch.comtheverge.comnbcnews.comgizmodo.comwired.comsecurityweek.comcnbc.com9to5mac.comcryptobriefing.combusinessinsider.comindependent.co.uk+6 altre

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AI · summaries
fortune.comStai leggendo1 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.

originale

Timeline cronologica

  1. martedì 9 giugno 2026·decrypt.co

    Anthropic Rolls Out Claude Mythos 5 AI Model—Along With the Safer Fable 5 for the Public - Decrypt

    Anthropic has released a full version of its cybersecurity-centric Claude Mythos model—along with a safer version for the general public.

  2. martedì 9 giugno 2026·techcrunch.com

    Anthropic releases Claude Fable, a version of Mythos, days after warning AI is becoming too dangerous

    Anthropic is releasing Claude Fable 5, its first Mythos-class model available to the public. The model comes with guardrails that block responses in high-risk areas like…

siliconrepublic.com
21 h 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
theguardian.com2 g fa

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

Leggi questa versione → originale
cryptobriefing.com7 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
techcrunch.com2 g fa

Anthropic releases Claude Fable, a version of Mythos, days after warning AI is becoming too dangerous

Anthropic is releasing Claude Fable 5, its first Mythos-class model available to the public. The model comes with guardrails that block responses in high-risk areas like cybersecurity and biology.

Leggi questa versione → originale
businessinsider.com2 g fa

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.

Leggi questa versione → originale
  • martedì 9 giugno 2026·theverge.com

    Anthropic releases its first Mythos-class model Claude Fable

    It says new safeguards make it possible to release a Mythos-class model it previously said was too risky to make public.

  • martedì 9 giugno 2026·nbcnews.com

    Anthropic releases Fable 5 model, built on the same tech that spooked the government

    The leading AI company says the new model is similar to the Mythos model previewed in April but safe for general use.

  • martedì 9 giugno 2026·gizmodo.com

    Anthropic Releases a Safer Version of Its ‘Too Dangerous’ Mythos AI

    The new model, called Fable 5, has capabilities that “exceed those of every model we’ve previously made generally available,” according to Anthropic.

  • martedì 9 giugno 2026·wired.com

    Anthropic Offers Mythos Upgrade for Cyber Partners and a ‘Safe’ Version for the Rest of You

    Anthropic is releasing Claude Mythos 5 to trusted organizations and Claude Fable 5 to the public, a version it says can’t be used for cyberattacks.

  • martedì 9 giugno 2026·securityweek.com

    Anthropic Launches Claude Fable 5: Mythos-Class AI With Cybersecurity Guardrails

    Anthropic launches Claude Fable 5, a Mythos-class AI model engineered with new safeguards that specifically restrict its use in cybersecurity.

  • martedì 9 giugno 2026·cnbc.com

    Anthropic releases Mythos-like AI model to the public two months after private rollout rocked Wall Street

    Anthropic said the broad release is possible because of new safeguards that block responses in specific high-risk areas.

  • martedì 9 giugno 2026·9to5mac.com

    Anthropic just released public Mythos-class AI model called Claude Fable, details here - 9to5Mac

    Back in April, Anthropic unveiled its Claude Mythos AI model that it said was too powerful to publicly release. Instead,...

  • martedì 9 giugno 2026·cryptobriefing.com

    Anthropic makes Mythos model available to users through safer Claude Fable 5 release

    Anthropic launched Claude Fable 5 with safeguards for high risk tasks while limiting Mythos 5 to trusted cyber partners.

  • 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.

  • martedì 9 giugno 2026·independent.co.uk

    Anthropic launches a version of the AI it claimed was too powerful to release

    ‘Fable 5’ is the same system as controversial Mythos but comes with safeguards

  • 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.

  • martedì 9 giugno 2026·theregister.com

    Anthropic spins a Fable of a neutered, safer Mythos

    Company also changes data retention policy

  • martedì 9 giugno 2026·theregister.com

    Anthropic spins a Fable of a tamer, safer Mythos

    Company also changes data retention policy

  • 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

  • mercoledì 10 giugno 2026·interconnects.ai

    Claude Fable 5 and new safety fables

    One step further into the power politics of frontier AI systems.

  • mercoledì 10 giugno 2026·cryptobriefing.com

    Anthropic rolls out public version of Mythos AI model with restrictions on cybersecurity use

    Anthropic launches Claude Mythos 5 for restricted cybersecurity use and Claude Fable 5 for the public, splitting its most powerful AI model into two tiers.

  • mercoledì 10 giugno 2026·bleepingcomputer.com

    Anthropic rolls out Claude Fable 5, but it's available for a limited time

    Anthropic has begun rolling out a new model called "Fable," which is based on the same underlying model as Mythos, its most powerful AI model class.

  • 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