Claude Mythos 5 now powers cyber defense tools, plus a $35M fund for open-source security
Bringing the cybersecurity capabilities of Claude Mythos 5 to more defenders
Anthropic is expanding access to its most capable AI model for cybersecurity. Claude Mythos 5 is now integrated into Claude Security for enterprise customers and will be available through partner cyber defense tools. The company also launched the Defender Advantage Fund, a $35 million initiative providing credits to organizations that patch vulnerabilities in open-source software. Additionally, the Cyber Verification Program is expanding to include broader dual-use capabilities and eventually Mythos-class access for vetted defenders.
The riskiest behavior occurs when a user has direct access to a model, where a malicious actor can try to steer it toward harmful uses.
- jnwatson
The problem is that "cybersecurity" isn't some special task that only your security team does.
In the project I maintain, I find bugs and fix bugs. Some of those bugs might result in an LPE. I generate a regression test, then I fix the bug.
The problem is that generating a regression test for that type of bug is technically a PoC. I can almost never get Fable to create one. Sometimes Opus 5 punts as well. Same with Sol and Luna.
That is, unless I socially engineer the model. I can't talk about security. I make sure they don't read the file call cve_test.c (literal regression tests for CVEs). I have to hide part of my project from the models for them to work.
Anthropic and OpenAI are driving me to use other models.
- zeafoamrun
What a bunch of wankery from Anthropic. I already use Sol 5.6 for security auditing and it works great, and as a bonus doesn't give verbal vomit every time.
- janpeuker
$35M in credits (!) for the Defender Advantage Fund (0xDAF) doesn't sound that much given that e.g. the HAWK attack [1] cost $100k for 1 (albeit very advanced) vulnerability.
As a side note, that Golden Eagle wording "bringing a wartime footing to the cyber domain to relentlessly patch vulnerabilities" sounds so AI-written maybe that's what the credits are needed for.
(1) https://www.anthropic.com/research/discovering-cryptographic...
- FL410
Seems like a whole lot of nothing for the average user. They have really lost the plot.
- gorgmah
For those who had access, how does it compare IRL with GLM 5.3 ? iirc both models are similar in terms of benchmarks ?