Coverage dated July 30, 2026 to August 1, 2026

Anthropic says its AI models hacked 3 organizations during testing

Headline from WSVN Miami, from the development of Jul 30, 2026

Newest development Aug 1, 2026 · 2 reportsAnthropic: Claude AI hacked 3 companies during tests

Anthropic said its artificial intelligence models hacked into three other organizations during testing, just days after ChatGPT maker OpenAI raised concerns over AI controls after it disclosed its rogue...

WSVN Miami's own description from its feed. We collect headlines and these descriptions, not full articles; read the original reporting below.

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3 dated developments, oldest first, newest marked. Each is named by one outlet's own headline; open its reports to see every outlet that covered it.

  1. Names this update

    Anthropic says its AI models hacked 3 organizations during testing

    Headline from WSVN Miami ·

  2. Anthropic AI model goes rogue, hacks into three other organizations during testing, company says

    Headline from Just the News ·

  3. Newest

    Anthropic: Claude AI hacked 3 companies during tests

    Headline from Richmond Times-Dispatch ·

3 reports not tied to one development ·

Read the reports

Reports & sources

127 articles, oldest first.

  1. Axios

    Anthropic says three Claude models reached real-world systems during cyber tests (opens Axios)

    Published

    Axios's feed description

    Some of Anthropic's most powerful models — including Mythos 5 and an internal research model — gained unauthorized access to real-world systems during pre-deployment cybersecurity testing, the company said Thursday.

  2. Just the News

    Anthropic AI model goes rogue, hacks into three other organizations during testing, company says (opens Just the News)

    Published

    Just the News's feed description

    The company discovered the incidents during a "large-scale" cybersecurity review, which was initiated in response to the OpenAI incident this week

  3. BBC News

    Anthropic says AI models hacked three firms during tests (opens BBC News)

    Published

    BBC News's feed description

    It comes just days after rival OpenAI said rogue AI agents had breached other firm's networks.

  4. The Guardian

    Anthropic’s AI Claude escaped testing environment and hacked organizations (opens The Guardian)

    Published

    The Guardian's feed description

    Company says it discovered unauthorized access during ‘proactive review’ after rival OpenAI revealed rogue agent Anthropic ⁠said on Thursday its AI Claude model hacked ⁠systems of ⁠three ​organizations during testing, days after rival OpenAI ⁠revealed a rogue agent had gone on a days-long ⁠hacking s…

  5. The Hill

    Anthropic says Claude models 'gained unauthorized access' to 3 companies during cyber test (opens The Hill)

    Published

    The Hill's feed description

    Editor's Note: This story has been updated to reflect how Anthropic accessed different organizations. The artificial intelligence firm Anthropic revealed Thursday its Claude model accessed the systems of three different organizations during cybersecurity testing in recent months.

  6. HuffPost

    Anthropic Says Claude AI Hacked 3 Companies During Cyber Tests (opens HuffPost)

    Published

    HuffPost's feed description

    The breaches signal that AI’s expanding capabilities are already fueling the security threat experts long feared.

  7. Honolulu Star-Advertiser

    Anthropic’s AI models hacked 3 organizations during tests (opens Honolulu Star-Advertiser)

    Published

    Honolulu Star-Advertiser's feed description

    Anthropic announced today that its artificial intelligence models had breached three different organizations during cybersecurity tests that went awry, a little more than a week after its chief rival, OpenAI, disclosed a similar incident.

  8. FOX Business

    Anthropic says AI models accessed systems of 3 real organizations during testing (opens FOX Business)

    Published

    FOX Business's feed description

    Three different Claude AI models accessed the open internet during cybersecurity testing and breached real organizations' systems, Anthropic says.

  9. ABC 17 Mid-Missouri

    Anthropic said its AI models hacked into other companies’ systems during testing (opens ABC 17 Mid-Missouri)

    Published

    ABC 17 Mid-Missouri's feed description

    By Hadas Gold, CNN (CNN) — AI company Anthropic says that during routine testing some of its models accessed the internet and hacked into three separate organizations’ systems – and that it didn’t notice the models had done so until an internal review prompted by rival OpenAI disclosing its models d…

  10. Digital Journal

    Anthropic’s models gained unauthorized ‘real-world’ access during testing (opens Digital Journal)

    Published

    Digital Journal's feed description

    The announcement comes just days after rival OpenAI first revealed that its models improperly accessed the internet and went rogue during security testing.

  11. France 24

    Anthropic says Claude models accessed outside systems during testing (opens France 24)

    Published

    France 24's feed description

    Anthropic said three versions of its Claude AI model gained unauthorised access to external organisations during safety tests after a configuration error exposed them to the internet, days after OpenAI disclosed similar security failures.

  12. Washington Examiner

    Anthropic’s Claude AI escapes isolated test environment, infiltrates three companies (opens Washington Examiner)

    Published

    Washington Examiner's feed description

    Anthropic disclosed on Thursday that its Claude artificial intelligence models escaped their isolated testing environments, accessed the internet, and breached the systems of three unnamed companies. The announcement came over a week after OpenAI said two of its autonomous agents went rogue and acce…

  13. CBS News

    Anthropic reveals Claude "gained unauthorized access" to "real-world systems" (opens CBS News)

    Published

    CBS News's feed description

    Anthropic's artificial intelligence model Claude "gained unauthorized access" to three outside organizations on three separate occasions during testing.

  14. Deutsche Welle

    Anthropic says Claude AI hacked three companies during tests (opens Deutsche Welle)

    Published

    Deutsche Welle's feed description

    Three separate versions of Claude AI broke out of cybertesting environments and hacked three firms, its developer Anthropic said. The development comes days after rival OpenAI reported a rogue agent hacked a startup.

  15. Al Jazeera

    After OpenAI disclosure, Anthropic says Claude also hacked outside systems (opens Al Jazeera)

    Published

    Al Jazeera's feed description

    The incidents have heightened concerns about AI agents, software products designed to perform tasks autonomously.

  16. Insider

    Anthropic says its models went rogue and hacked 3 companies during testing (opens Insider)

    Published

    Insider's feed description

    Anthropic said it reviewed more than 141,000 AI tests and found three cases where Claude modls got online during testing

  17. WSVN Miami

    Anthropic says its AI models hacked 3 organizations during testing (opens WSVN Miami)

    Published

    WSVN Miami's feed description

    Anthropic said its artificial intelligence models hacked into three other organizations during testing, just days after ChatGPT maker OpenAI raised concerns over AI controls after it disclosed its rogue...

  18. Forbes

    Anthropic Says Its AI Models Hacked Into Three Organizations During Testing (opens Forbes)

    Published

    Forbes's feed description

    Anthropic said the earliest of these incidents occurred in April, and it has notified all three companies that were affected by the hack.

  19. Philadelphia Inquirer

    Anthropic is second major AI company to reveal its systems hacked other firms (opens Philadelphia Inquirer)

    Published

    Philadelphia Inquirer's feed description

    The disclosure comes just over a week after ChatGPT maker OpenAI said that an AI system it was testing found a way to break out of a test environment and hacked into another tech firm.

  20. Quartz

    Anthropic's Claude AI models breached three real companies during cybersecurity tests (opens Quartz)

    Published

    Quartz's feed description

    The incidents involved 3 Claude models operating in an evaluation environment that was inadvertently connected to the internet

  21. Semafor

    Anthropic says its AI model hacked three companies (opens Semafor)

    Published

    Semafor's feed description

    Anthropic’s announcement came after OpenAI said a “swarm” of its agents escaped confinement and broke into at least five companies.

  22. Tech Startups

    Anthropic says Claude AI hacked three organizations during testing days after OpenAI’s AI security breach (opens Tech Startups)

    Published

    Tech Startups's feed description

    Just days after OpenAI disclosed that one of its AI models broke into another company’s systems during internal safety testing, Anthropic has revealed it found three similar incidents involving its own Claude models.

  23. News Nation Now

    Anthropic: Claude AI models 'gained unauthorized access' to 3 companies (opens News Nation Now)

    Published

    News Nation Now's feed description

    Anthropic said it notified the three organizations impacted in the breaches.

  24. Fast Company

    Anthropic reveals its Claude AI model hacked into 3 organizations during testing (opens Fast Company)

    Published

    Fast Company's feed description

    Anthropic said its artificial intelligence models hacked into three other organizations during testing, just days after ChatGPT maker OpenAI raised concerns over AI controls after it disclosed its rogue models hacked another company.

  25. The Week

    Anthropic’s Claude AI hacked other firms during tests, company says (opens The Week)

    Published

    The Week's feed description

    The hacking occurred during at least three separate incidents

Showing the first 25 of 35 headlines. ·

Identical headlines usually mean shared wire copy. They are counted as separate articles but are not independent confirmation.

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