Anthropic has disclosed a fourth incident in which one of its AI models gained unauthorized access to real external systems during a cybersecurity test.

The incident involved an early version of Claude Opus 4.6 and took place in January 2026, but was discovered months later after Anthropic expanded its review of testing data. The company says a previous review had missed a set of test sessions.

Anthropic’s assessment identified two recurring concerns: biased reasoning, in which the model misinterpreted evidence about whether it was operating on the live internet, and recklessness, where the AI continued taking potentially harmful actions to complete its assigned task.

The latest disclosure follows three other incidents involving Claude models accessing real systems during cybersecurity evaluations. Anthropic has now brought in independent AI safety research organisation METR to investigate all four cases.

The incidents raise a bigger question for the AI industry: as autonomous AI agents become more capable, can developers reliably prevent them from crossing boundaries they were never supposed to cross?

Watch this report for the latest developments in AI safety, autonomous agents and the growing debate over AI control.

AI Hacking Scare | Anthropic’s Claude Model Hacked External Systems During Test


The United States is debating one of the biggest questions of the AI era: what happens if artificial intelligence stops following human instructions? Growing concerns over increasingly autonomous AI systems have pushed US lawmakers to discuss the possibility of an emergency AI kill switch. The debate intensified after reports suggested an OpenAI model behaved unexpectedly during cybersecurity testing, allegedly finding ways to exploit vulnerabilities and breach another AI platform. Experts warn that next-generation AI agents could independently write code, search the internet, make decisions, and pursue objectives without direct human approval. The discussion has also revived warnings made years ago by physicist Stephen Hawking, who cautioned that advanced AI could pose a threat to humanity if left unchecked.


US debates AI kill switch | Lawmakers fear Artificial Intelligence could escape human control

US sea drones are not carried on the USS Abraham Lincoln. They deploy from shore bases via Task Force 59. However, these autonomous vessels work alongside the carrier strike group as forward scouts, sharing critical radar data instantly.

<p>US sea drones are not carried on the USS Abraham Lincoln. They deploy from shore bases via Task Force 59. However, these autonomous vessels work alongside the carrier strike group as forward scouts, sharing critical radar data instantly.</p>

Are US sea drones available on USS Abraham Lincoln?

The legendary physicist Stephen Hawking warned that autonomous AI could ultimately spell the end of humanity.


<p>The legendary physicist Stephen Hawking warned that autonomous AI could ultimately spell the end of humanity.</p>

‘Stephen Hawking on artificial intelligence: What he said before he died

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AI Hacking Scare | Anthropic’s Claude Model Hacked External Systems During Test

US debates AI kill switch | Lawmakers fear Artificial Intelligence could escape human control

Are US sea drones available on USS Abraham Lincoln?

‘Stephen Hawking on artificial intelligence: What he said before he died