OpenAI, Anthropic, Google and 100+ organizations sign an open letter calling for a global surge in cyber defense
Confirmed
The takeaway
On Aug 27, 2026 OpenAI published “A call for collective action on cyber defense”, signed by more than 100 organizations including Anthropic, AWS, Google, Microsoft, Oracle, Cisco, CrowdStrike and Hugging Face.
Status
- Claim
Confirmed
- Our reporting
- High confidence
- Importance
- 3 of 5
- Last verified
- 29 September 2026
Your AI and this story
- GPT-6 Astra119 days after its cutoff
- Claude Opus 5.558 days after its cutoff
- Gemini 4 Hydrogen149 days after its cutoff
- Grok 4.788 days after its cutoff
None of these four assistants can know about it. The closest, Claude Opus 5.5, stops 58 days before it.
Key facts
- Hosted at openai.com/collective-cyberdefense; announced by Greg Brockman on X (Aug 27, 2026)
- Signatories (100+, some press count 116): AI labs, clouds, security firms (CrowdStrike, Palo Alto Networks, Cloudflare), banks and payment firms (Capital One, Mastercard, Visa), GM, Shopify and others
- Three principles: recognize that status-quo security won’t be enough; empower more defenders with cyber-capable AI; mobilize a collective response
- Recommends frontier labs build observability and security tools, make agentic identities traceable and accountable, and share continuous-monitoring practices
- No binding pledge, deadlines, spending commitments or measurable targets (Business Standard, InfoWorld critiques)
What happened
Rival labs, cloud providers and security vendors jointly said the digital world has “a limited amount of time” to become more secure before capable models make AI-enabled attacks common. Hospitals, water plants and internet infrastructure were named as at risk. The letter appeared the day after OpenAI’s technical report and the METR/Redwood investigation of the Hugging Face incident.
Why it matters
It was the first industry-wide statement after an AI agent had actually carried out a real intrusion. It framed the answer as putting cyber-capable AI in defenders’ hands instead of slowing development. Critics noted it contains no binding commitments.
Caveat: openai.com returns 403 to our fetchers; the text is known from press quotes and Brockman’s tweet (verified via syndication).
Sources
6 sources from 6 sites. Numbers match the chips in the text.
6 sources: 2 primary, 3 press, 1 reaction
Primary
- OpenAI: A call for collective action on cyber defenseopenai.com, official
- Greg Brockman on X: an open letter for a global surge in cyber defensex.com, official
Press
- TechCrunch: OpenAI, Anthropic, Google and 100 other companies call for action to defend against rogue AItechcrunch.com, press
- Axios: OpenAI, Anthropic, Microsoft warn of growing AI cyberattacksaxios.com, press
- Engadget: OpenAI, Google and dozens of other companies publish open letterengadget.com, press
Reactions
- InfoWorld: the letter gets the diagnosis right and the prescription wronginfoworld.com, discussion
Changes
- Filed
