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Anthropic says its models were misused for biological weapons research, surveillance and cyber attacks

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Anthropic says it disrupted scientists using Claude AI for possible biological weapons development

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There's a "wall of fear-mongering and doomerism" in the AI world right now.

"Worrying about AI today is like worrying about overpopulation on Mars."

Concerns that AI could pose a threat to humanity is "preposterously ridiculous."

Claiming AI poses an existential threat is "such an extreme" and risks "wip[ing] out some of its potential benefits."

"I'm more concerned about... the risks that are here and now [than the existential threat of AI]."

Current AI is "not anywhere close" to posing an existential threat but it could in the future.

AI is the "biggest existential threat" to humanity.

AGI's worst-case scenario would be "lights-out for all of us."

Powerful AI systems "taking control" pose an "existential threat."

AI has a "10 to 25 per cent" chance of destroying humanity.

"The most likely result of building a superhumanly smart AI... is that literally everyone on Earth will die."

Does AI Pose an Existential Threat to Humanity?

Anthropic said Thursday it disrupted five cases in which scientists used its Claude AI models in ways that could support biological weapons development, banning the accounts involved and sharing findings with authorities and industry partners.

Martha MacCallum

Anthropic said Thursday it disrupted five cases in which scientists used its Claude AI models in ways that could support biological weapons development, banning the accounts involved and sharing findings with authorities and industry partners.

The company said it could not determine whether the research was legitimate or nefarious, because valid biological inquiry that leads to vaccines can also help engineer dangerous pathogens, so it erred on the side of caution.

The company said it could not determine whether the research was legitimate or nefarious, because valid biological inquiry that leads to vaccines can also help engineer dangerous pathogens, so it erred on the side of caution.

One case detected in May involved a scientist seeking help drafting a grant application for gain-of-function research on chikungunya, a mosquito-borne virus. Anthropic said the work was intended for a military research institute.

One case detected in May involved a scientist seeking help drafting a grant application for gain-of-function research on chikungunya, a mosquito-borne virus. Anthropic said the work was intended for a military research institute.

Jacob Klein, Anthropic's head of threat intelligence, said detection is difficult: "You are not seeing someone in a comic book kind of way say, 'Hey, I want to build a biological weapon to kill everybody.'"

Jacob Klein, Anthropic's head of threat intelligence, said detection is difficult: "You are not seeing someone in a comic book kind of way say, 'Hey, I want to build a biological weapon to kill everybody.'"

The roughly 150-page report, covering December 2025 through August 2026, also documented actors in China, Russia and Yemen using Claude for weapons software, surveillance of dissidents and influence operations timed to elections in Moldova and Kenya.

The roughly 150-page report, covering December 2025 through August 2026, also documented actors in China, Russia and Yemen using Claude for weapons software, surveillance of dissidents and influence operations timed to elections in Moldova and Kenya.

Anthropic said a Russia-linked actor it tracks as GTG-20006 used AI-driven workflows for phishing and DNS hijacking against more than 20 organizations, while other operators stole customer API keys to run attacks at victims' expense.

Anthropic said a Russia-linked actor it tracks as GTG-20006 used AI-driven workflows for phishing and DNS hijacking against more than 20 organizations, while other operators stole customer API keys to run attacks at victims' expense.

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One case detected in May 2026 involved a scientist seeking help drafting a grant application for gain-of-function research on chikungunya, a mosquito-borne virus. Anthropic said the work was intended for a military research institute.

One case detected in May 2026 involved a scientist seeking help drafting a grant application for gain-of-function research on chikungunya, a mosquito-borne virus. Anthropic said the work was intended for a military research institute.

Anthropic's threat report shows the safeguards are doing exactly what they should. Every single operation — Russian espionage crews, ShinyHunters extortionists, hacktivists running stolen API keys — was detected, disrupted and reported to authorities and industry partners. Publishing the playbook openly lets defenders everywhere spot the same activity, and that transparency is worth more than panic.

Anthropic's threat report shows the safeguards are doing exactly what they should. Every single operation — Russian espionage crews, ShinyHunters extortionists, hacktivists running stolen API keys — was detected, disrupted and reported to authorities and industry partners. Publishing the playbook openly lets defenders everywhere spot the same activity, and that transparency is worth more than panic.

Catching a few plots after the fact is not a safety record. Scientists tied to state programs slipped past regional blocks and disguised research into chikungunya, avian flu and toxin design, and the company admitted it could not reliably separate legitimate work from weapons development. Nothing short of hard restrictions on the highest-risk capabilities and real international rules will do here.

Catching a few plots after the fact is not a safety record. Scientists tied to state programs slipped past regional blocks and disguised research into chikungunya, avian flu and toxin design, and the company admitted it could not reliably separate legitimate work from weapons development. Nothing short of hard restrictions on the highest-risk capabilities and real international rules will do here.

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Anthropic Says It Blocked Possible Efforts to Build Bio Weapons

Artificial Intelligence

Biological & chemical weapons

Anthropic's threat report shows the safeguards are doing what they should. Every single operation — Russian espionage crews, ShinyHunters extortionists, hacktivists running stolen API keys — was detected, disrupted and reported to authorities and industry partners. Publishing the playbook openly lets defenders everywhere spot the same activity, and that transparency is worth more than panic.

Anthropic's threat report shows the safeguards are doing what they should. Every single operation — Russian espionage crews, ShinyHunters extortionists, hacktivists running stolen API keys — was detected, disrupted and reported to authorities and industry partners. Publishing the playbook openly lets defenders everywhere spot the same activity, and that transparency is worth more than panic.

The danger of bioweapons and AI is no longer theoretical. Scientists tied to state programs slipped past regional blocks and disguised research into chikungunya, avian flu and toxin design, and Anthropic admitted it could not reliably separate legitimate work from weapons development. Nothing short of hard restrictions on the highest-risk capabilities and real international rules will do here for what could be the most high-stakes tech of our time.

The danger of bioweapons and AI is no longer theoretical. Scientists tied to state programs slipped past regional blocks and disguised research into chikungunya, avian flu and toxin design, and Anthropic admitted it could not reliably separate legitimate work from weapons development. Nothing short of hard restrictions on the highest-risk capabilities and real international rules will do here for what could be the most high-stakes tech of our time.

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