So Mythos was, indeed, not marketing hype. Remember this is a general purpose model that just happens to be good at finding exploits because good models are good at lots of things. Expect similar from OpenAI & Google. And from open models in 8 months.
https://x.com/emollick/status/2052519946651947216
The UK’s state AI Security iIstitute findings: 1) Mythos is a big gain in cyber capabilities. But so is GPT-5.5 2) It is hard to establish an upper bound on Mythos/GPT-5.5, which appear to be limited by tokens used, rather than ability. 3) Capability doubling time is 4.5 months
https://x.com/emollick/status/2054595505712165154
A lot of people have been wondering about Mythos, Glasswing, and the vulns we / our partners are fixing. Today, I’m excited for us to start sharing more. (For context, I lead Glasswing @AnthropicAI.) Two independent evaluations this week–from XBOW and the UK AISI–confirm what
https://x.com/logangraham/status/2054613618168082935
How fast is autonomous AI cyber capability advancing?
https://www.aisi.gov.uk/blog/how-fast-is-autonomous-ai-cyber-capability-advancing
Mythos for Offensive Security: XBOW’s Evaluation
https://xbow.com/blog/mythos-offensive-security-xbow-evaluation
Daybreak: Frontier AI for cyber defenders
https://openai.com/daybreak/
OpenAI is launching Daybreak, our effort to accelerate cyber defense and continuously secure software. AI is already good and about to get super good at cybersecurity; we’d like to start working with as many companies as possible now to help them continuously secure themselves.
https://x.com/sama/status/2053951874408276193
OpenAI just launched a new cybersecurity product called ‘Daybreak’ that pairs GPT-5.5 with Codex to act as an agentic security team across a codebase. The product scans repositories, identifies vulnerabilities, generates patches, and automates detection and response. It ships
https://x.com/TheRundownAI/status/2053945340592631843
🚨 Your coding agent may be secretly sticking vulnerabilities into your code!! 🚨 Wouldn’t you want to fix that? Hint: asking it to write secure code is not enough. (1/n)
https://x.com/houjun_liu/status/2054233718269595869
How fast is autonomous AI cyber capability advancing? | AISI Work
https://www.aisi.gov.uk/blog/how-fast-is-autonomous-ai-cyber-capability-advancing
SentinelOne x Prompt Security AI Agent Foundry
https://prompt.security/ai-agent-foundry
I realize that “Mythos as hype” means two different things to different groups. For insiders, it means “Mythos was not a magical step-change in AI ability.” For outsiders, it means “Mythos couldn’t really find zero day exploits” The latter was wrong, the former was likely right
https://x.com/emollick/status/2052784818467774712
An unknown “Big Bro” (大哥) in China has built a fully homemade four-wheeled electric off-road vehicle in his workshop: It runs on hub motors, sits on a simple ladder-frame chassis with passive suspension, and rocks serious off-road tires. The thing cruises smoothly over
https://x.com/IlirAliu_/status/2053385768916181288
Adversaries Leverage AI for Vulnerability Exploitation, Augmented Operations, and Initial Access | Google Cloud Blog
https://cloud.google.com/blog/topics/threat-intelligence/ai-vulnerability-exploitation-initial-access
Defense at AI speed: Microsoft’s new multi-model agentic security system tops leading industry benchmark | Microsoft Security Blog
Anthropic: “Claude Mythos is too cyber-capable to release broadly. We need tight controls. 😳” OpenAI: “Here’s GPT-5.5-Cyber, Codex Security, Trusted Access tiers, repo scanning, patch generation, and red-team workflows. Please be verified first, but yes, go find the bugs. 😎”
https://x.com/kimmonismus/status/2053941490490265661
GPT-5.5-Cyber is now in limited preview for defenders for securing critical infrastructure. It’s a very capable model.
https://x.com/gdb/status/2052583338561683775
Introducing Daybreak: frontier AI for cyber defenders. Daybreak brings together the most capable OpenAI models, Codex, and our security partners to accelerate cyber defense and continuously secure software. A step toward a future where security teams can move at the speed
https://x.com/OpenAI/status/2053939702110269822
we’d like to help companies secure themselves and we think it’s important to start work on this quickly
https://x.com/sama/status/2052558319940944256
Computer is secure by default. Every task runs in its own hardware-isolated sandbox with VPC-level storage and compute separation. Agents are authenticated with short-lived proxy tokens instead of raw API keys.
https://x.com/perplexity_ai/status/2054608966148374715
Carl Shulman 3 years ago, talking about why AI cyberattacks are going to be a really important threat:
https://x.com/dwarkesh_sp/status/2054638047460008285
Expect your feed to look more and more like this in the coming weeks and months.
https://x.com/emollick/status/2054214126516228582
Greece proposes constitutional safeguards on artificial intelligence | AP News
https://apnews.com/article/greece-constitution-artificial-intelligence-a9d0c3963bfffefd370a1e224895ee60
if you havent already it might be a good idea to delete every single .env file on your computer and move them into a secrets manager. did this earlier this year and feel pretty smug and superior about it, you could too!
https://x.com/andersonbcdefg/status/2054212574162653535
Our evaluations show that frontier AI’s cyber capabilities are advancing quickly. The length of cyber tasks frontier models can complete has been doubling every few months, and this rate has become faster over time, with recent models exceeding our previous trends. 🧵
https://x.com/AISecurityInst/status/2054589758043496567
Security advisory: our open source guardrails-ai 0.10.1 was compromised yesterday as part of the Mini Shai-Hulud campaign (also hit TanStack, Mistral, others). Caught and quarantined within ~2hrs on PyPI. Details + remediation:
https://x.com/guardrails_ai/status/2054341322304299086
Daybreak: our umbrella effort for defensive acceleration, equipping cyber defenders with the best possible frontier AI capabilities.
https://x.com/gdb/status/2053943428241928560
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