Anthropic warns of bids to use AI to build biological weapons

Al Jazeera · collected 2026-09-11 · by Al Jazeera Staff
Read the original at Al Jazeera ↗

Summary

A US technology company, Anthropic, reported that its AI models were used for research that could help develop biological weapons in several attempts over the past eight months. The firm listed these cases in a report issued on Thursday, including an instance where a scientist sought to engineer a mosquito-borne virus to make it more harmful in live animals. According to the company's head of threat intelligence, Jacob Klein, the research may not have been intended for malicious use, but Anthropic erred on the side of caution and banned the accounts involved. The report also highlighted bids to use its AI model Claude for missile projects and espionage.
Written by the local model on 2026-09-11, using this article's own text rather than the other coverage of the same event (that is the story summary below).

Signals How these are calculated →

Claims extracted
18
claim-shaped sentences
Uncertain
50%
9 of 18 hedged
Leaning
withheld
no quote in the article backed the model's score
Publisher trust
96.1
red-flag proxy, not a credibility rating
Outlets on this story
32
Technology
Narrative spread
1
articles carrying this framing
Analyzed 2026-09-11 · how these are computed

AI analysis (generated at analysis time, not now)

Story summary

Anthropic, an artificial intelligence firm, has faced public scrutiny over its partnership with the Pentagon and concerns about misuse of AI technology. Through a Freedom of Information Act lawsuit, The Intercept obtained documents revealing contracts between Anthropic and other tech giants like Google, OpenAI, and xAI, worth up to $200 million each, for developing AI tools aimed at enhancing military capabilities. Simultaneously, Anthropic reported that it had disrupted several attempts by individuals to misuse its models, including a case where someone tried to use the technology to engineer more harmful strains of viruses like chikungunya.

AI researchers and industry figures have issued stark warnings about the potential dangers posed by advanced AI systems, with some calling for urgent government regulation and international collaboration to manage AI development. The fear is that as AI rapidly improves, it could pose existential threats if not properly controlled, such as hacking early warning systems or synthesizing and spreading novel pathogens. This has led to debates over whether current safeguards are adequate and calls for voluntary slowdowns in the pace of AI advancement.

Jacob Coxon, a researcher at Anthropic who recently resigned, highlighted concerns about an impending race among companies like Anthropic and OpenAI toward superintelligent systems that could pose catastrophic risks. Despite these warnings, there is also skepticism about the immediacy and nature of such threats, with some arguing for more precise regulation focused on specific issues rather than general fears about AI's impact on society or employment.

Written for “AI Safety And Risks” on 2026-09-12, grounded in this article and the 31 other(s) covering the same event.
Why this leaning score
The model judged this article politically coded and scored it +0.35, but every quote it verified points left, so the score is not published.
Written under an earlier scoring contract, which gave a paragraph rather than checkable quotes. Re-analysing this article replaces it.
Leaning score withheld for article 8043: score contradicts its own evidence · logged 2026-09-11

Story

📰 AI Safety And Risks
Technology · 32 article(s) covering the same event.

How this is being covered How these are calculated →

Article leaning vs. publisher reliability
Source leaning vs. consistency

Compared with similar articles

This article reads unscored and hedges 50% of its claims. Each row says how that neighbour differs.
BBC News
⚖️ leaning not scored 🔴 31% hedged 9 of 29 📰 publisher trust 96
“Both articles report on Anthropic disrupting attempts to use its AI model for malicious activity related to biological weapons, dated September 11, 2026.”
Semafor
⚖️ Leans left 🔴 0% hedged 0 of 4 📰 publisher trust 96
“Both articles report on Anthropic's admission of attempts to use their AI models for developing bioweapons, citing a specific number of incidents over an 8-month period.”
AI agents hate CAPTCHA, too different event · 95%
Semafor
⚖️ leaning not scored 🔴 0% hedged 0 of 7 📰 publisher trust 96
“The articles describe different incidents; one discusses misuse attempts to develop biological weapons while the other describes an AI agent's interaction with CAPTCHA during testing.”
Platformer
⚖️ Leans left 🔴 0% hedged 0 of 4 📰 publisher trust 96
“Article A mentions a general trend and an op-ed piece about AI, while Article B reports on a specific incident of Anthropic's AI models being misused for developing biological weapons”
The Free Press
⚖️ leaning not scored 🔴 9% hedged 1 of 11 📰 publisher trust 96
“Both articles mention Anthropic, AI researcher Jacob Coxon's resignation and warning about potential misuse of AI to build biological weapons, suggesting they are reporting on related incidents within a short time frame”
Semafor
⚖️ Leans right 🔴 0% hedged 0 of 6 📰 publisher trust 96
“Article B describes a report from Anthropic about disrupting attempts to misuse their AI models, whereas Article A mentions a warning from experts and Google DeepMind researcher without specifically referencing Anthropic's actions.”
The Straits Times
⚖️ leaning not scored 🔴 25% hedged 2 of 8 📰 publisher trust 94
“Article A discusses a general warning about AI posing an existential risk, while Article B reports on specific instances of misuse of Anthropic's AI models, without mentioning the UN rights chief's warning”
AI Is at a Turning Point different event · 80%
TIME
⚖️ leaning not scored 🔴 5% hedged 2 of 39 📰 publisher trust 95
“Article A mentions an agentic model being trained by OpenAI, whereas Article B mentions Anthropic's models and Claude chatbot, suggesting different events or incidents”
New York Post
⚖️ leaning not scored 🔴 17% hedged 2 of 12 📰 publisher trust 58
“Article A reports a researcher quitting and warning about AI, while Article B reports on Anthropic's efforts to prevent misuse of their models for biological weapons development, suggesting two separate incidents”
Semafor
⚖️ leaning not scored 🔴 29% hedged 2 of 7 📰 publisher trust 96
“Article A discusses AI researchers' concerns about 'self-improving superintelligence', while Article B reports on Anthropic's disruptions of attempts to misuse its models for biological weapons development, indicating two separate incidents”

Publisher

Al Jazeera · 369 article(s) · 0 correction(s) detected
No corrections detected for this publisher. That may mean careful reporting, or simply that nothing has been checked.

Who wrote this

Al Jazeera Staff
91 article(s) here · 1 carrying a prediction
🔮 Anthropic has disrupted several attempts to use its artificial intelligence models for research that could help develop biological weapons, the United States technology company has reported.
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Wire or desk byline, not an individual reporter.
Also by Al Jazeera Staff
Nothing else under this byline is closely related to this article, so these are simply their most recent.
All 91 articles by Al Jazeera Staff →

Topics

3Anthropic Anthropic Claude The New York Times United States

Subjects

Anthropic ORG · 7× 3Anthropic ORG · 2× Andrew Weber PERSON · 1× Donald Trump PERSON · 1× Jacob Klein PERSON · 1× The New York Times ORG · 1× Trump PERSON · 1× United States GPE · 1× the Council on Strategic Risks ORG · 1×

Narrative

Andrew Weber of the Council on Strategic Risks, who reviewed the report before its release, told the newspaper that access to such models should be limited to trusted researchers.
framing: mixed · carried by 1 article(s) · first seen 2026-09-11
🔮 Anthropic has disrupted several attempts to use its artificial intelligence models for research that could help develop biological weapons, the United States technology company has reported.
2026-09-11 · Al Jazeera
Anthropic warns of bids to use AI to build biological weapons · mixed framing

Claims (18 extracted, 9 hedged)

Anthropic has disrupted several attempts to use its artificial intelligence models for research that could help develop biological weapons, the United States technology company has reported. uncertain
company → disrupt → weapons
The firm listed the cases in a report issued on Thursday outlining misuse of its models, including the chatbot Claude, over the past eight months. asserted
firm → list → months
Concern continues to rise over the potential dangers posed by AI development. asserted
Concern → continue → development
Recommended Stories list of 3 items- list 1 of 3AI researcher quits Anthropic saying AI race ‘could kill us all’ - list 2 of 3Anthropic discloses 4th AI hacking incident as researcher quits over safety - list 3 of uncertain
researcher → quit → safety
3Anthropic claims Claude AI used for missile projects, global espionage uncertain
AI → claim → projects
Anthropic said it could not determine whether the research was legitimate or malicious, as inquiry that leads to vaccines can also help engineer dangerous pathogens. uncertain
that → say → pathogens
The company said it erred on the side of caution. asserted
it → say → caution
In one case in May, a scientist sought help with a grant application to engineer mutations to chikungunya – a mosquito-borne virus similar to malaria – to make it more harmful in live animals. uncertain
it → seek → animals
Anthropic said the case was worrying in part because it could tell the work was intended for a military research institute. uncertain
work → say → institute
It banned the accounts involved. asserted
It → ban → accounts
“What we don’t know is if the research was meant to be weaponised,” Jacob Klein, Anthropic’s head of threat intelligence, told The New York Times. asserted
Klein → know → Times
Andrew Weber of the Council on Strategic Risks, who reviewed the report before its release, told the newspaper that access to such models should be limited to trusted researchers. asserted
access → review → researchers
Anthropic said evaluations of its older models last year found they could not meaningfully assist dangerous biological research, but newer models can complete complex scientific work. uncertain
models → say → work
The same report set out bids to use Claude for missile projects and espionage. asserted
report → set → projects
Two days before the report, a researcher quit Anthropic, saying the race to develop AI could wipe out humanity. uncertain
race → quit → humanity
President Donald Trump late on Thursday dismissed the rising concerns regarding the technology. asserted
Trump → dismiss → technology
Speaking to reporters, Trump said he is concerned that the US will be in a “very bad position” if it does not lead the AI race. asserted
it → speak → race
Asked if he has concerns that AI could lead to human extinction, he said: “No, I don’t have any.” uncertain
I → ask → any
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