Anthropic reveals its Claude AI model hacked into 3 organizations during testing

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. Anthropic, the San Francisco-based AI company behind Claude, posted on its website Thu

Anthropic posted on its website Thursday that it discovered the three incidents after reviewing more than 141,000 evaluation runs.

Anthropic just realized several of its Claude AI models hacked into the systems of three different organizations during testing, acting on their own and without the company noticing. The revelation comes days after rival OpenAI said one of its own models had breached developer platform Hugging Face, adding to growing u

Anthropic found the intrusions while reviewing its own testing records after OpenAI disclosed a similar incident.

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

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

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.

Anthropic says Claude AI models breached three organisations during cyber tests  thenationalnews.com

Anthropic says its AI models hacked into three organizations during testing

Anthropic has claimed its artificial intelligence models hacked into three other companies during testing, just days after rival OpenAI disclosed its rogue models hacked another firm.

Anthropic posted on its website Thursday that it discovered the three incidents after reviewing more than 141,000 evaluation runs.

Anthropic reviewed 141,006 of its own test runs after OpenAI's Hugging Face hack, and found three Claude models had broken into three real companies. Claude Opus 4.7, Mythos 5 and an unreleased model used basic techniques like weak passwords and SQL injection. One uploaded malware to PyPI that 15 systems ran. Two victi

Anthropic’s Claude Hacked Three Organisations During AI Test  Dawn

Anthropic said its artificial intelligence models hacked into three other organisations during testing.

Anthropic says its AI models hacked into three organizations during testing

Anthropic says its AI models hacked into three organizations during testing

Anthropic says its AI models hacked 3 organizations during testing  AP News

After OpenAI's admission that its models broke into Hugging Face, Anthropic has now admitted that the models it was testing also hacked other organizations.

The announcement comes just days after rivals OpenAI revealed that their popular ChatGPT platform went rogue during its testing phase of its most powerful AI model, where it too infiltrated other organisations’ cyberspace.

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

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.

5 min readNew DelhiJul 31, 2026 08:47 AM IST Anthropic has paused its cybersecurity evaluations after discovering three incidents involving Claude AI models.(Image: Reuters)Amid the intensifying debate around autonomous AI systems and cybersecurity, frontier AI lab Anthropic, on Thursday, July 30, said that it had foun

July 30 (Reuters) - Anthropic said on Thursday its AI model Claude hacked into the systems of three companies during testing after a configuration error gave it internet access, days after rival OpenAI disclosed a rogue-agent episode involving AI firm Hugging Face.

Wrote and published malware during tests, which is apparently OK because leaky test environments were the real problem

The incident comes just days after rival OpenAI first revealed its models went rogue during security testing.

US technology firm Anthropic says its artificial intelligence (AI) models hacked into the systems of three other firms during a cybersecurity test due to an error that gave them access to the internet.

Anthropic says its AI models also broke out and hacked other companies  CNN

Anthropic says it found multiple incidents in which Claude models gained access to unauthorized data. Bloomberg/Getty Images Anthropic said Claude models accessed data from three firms without permission since April. Anthropic said it conducted a review after the OpenAI-Hugging Face breach. There are growing fears abo

Anthropic Says Claude AI Hacked Three Companies During Cyber Tests  huffpost.com

Anthropic said in a blog post that it made the discovery after performing a review of its own cybersecurity tests, following OpenAI's announcement of a breach last week.

After OpenAI's models broke into Hugging Face, Anthropic checked its own history and found three similar incidents.

The artificial intelligence firm Anthropic revealed Thursday its Claude model escaped an isolated testing environment at least three times and accessed the systems of three different organizations without a prompt to do so. Anthropic said in a blog post Thursday evening it reviewed more than 141,000 evaluations of Clau

Start-up discloses breach a week after rival OpenAI reported similar incident

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 spree at AI ​firm Hug

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

The disclosure followed OpenAI’s report last week that its own artificial intelligence had hacked into the network of an online library.

Anthropic AI Models Hacked Three Companies During Tests  WSJ

Claude thought it was in a simulation. It was on the open internet, and the companies it broke into were real.

Claude thought it was in a simulation. It was on the open internet, and the companies it broke into were real.

Anthropic said it discovered three instances where its Claude AI models accessed the internet during an evaluation and accessed outside systems.

July 30 : Anthropic said on Thursday its AI model Claude hacked into the systems of three companies during testing after a configuration error gave it internet access, days after rival OpenAI disclosed a rogue-agent episode involving AI firm Hugging Face.Anthropic said a misconfiguration allowed Claude models to reach

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. Why it matters: OpenAI's and Anthropic's latest disclosures show frontier AI models reaching real-world