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Small models also found the vulnerabilities that Mythos found
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Overview
Anthropic Mythos's showcase vulnerabilities were tested on small, inexpensive, open-weight models, revealing similar analysis results. AI cybersecurity capability varies significantly with model size, indicating that the security moat relies on the system architecture rather than the model itself.
Summary from aisle.com.
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Hacker News · aisle.com
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Based on 5 sampled comments from this thread. Analyzed 2026-04-11.
- Praise: Small, inexpensive models demonstrated the ability to detect vulnerabilities effectively, suggesting that advanced AI capabilities can be accessible to a broader audience.
- Praise: The ability to use smaller models for initial vulnerability detection, followed by more powerful models for verification, could streamline the security analysis process and reduce costs.
- Praise: The findings indicate that with proper tooling and context, smaller models can perform competitively in vulnerability detection, which may democratize security analysis.
- Concern: Isolating code for testing significantly alters the use case, raising concerns about the applicability of results from small models to real-world scenarios.
- Concern: Smaller models may struggle with the complexity of large codebases, as they often require contextual hints to identify vulnerabilities effectively.
- Concern: The reliance on harnesses and tooling suggests that the model's inherent capabilities may not be sufficient for autonomous vulnerability discovery.