Discussion

• @claudeai Claude on x

  Claude Security scans now run on Claude Mythos 5, available today in public beta for all Claude Enterprise customers. Put our most capable security model to work on your codebase, no separate model access needed.

• @claudeai Claude on x

  Point Claude Security at a GitHub repo and Mythos scans for vulnerabilities tracing data across files and reasoning about how components interact. Each finding comes back with a CWE category, confidence and severity ratings, and a suggested fix.

• @andrewcurran_ Andrew Curran on x

  This is the first time any access to Mythos 5 has been granted beyond the small group that had access through Project Glasswing.

• @illscience Anish Acharya on x

  Labs will increasingly intermediate access to the best models and deliver the intelligence as a service / outcome vs API Also interesting to see the first steps towards labs internalizing routing - you just use “Anthropic” and it internally routes to Mythos / Sonnet / Opus etc

• @martin_casado @martin_casado on x

  Third party, API First party, Claude Code No party, .... this ... 👇

• @lukeyoungblood @lukeyoungblood on x

  You're not angry enough at @AnthropicAI. They gated all cybersecurity functionality behind an Enterprise paywall and then happily fallback to a lesser model if you try to use Fable 5 to do the same work. This is making software demonstrably less safe. Time to use GLM 5.2.

• @_simonsmith Simon Smith on x

  This actually seems like a good tradeoff. Defenders get access to a powerful model, in a way that prevents opportunities for misuse.

• @claudeai Claude on x

  It's one of several steps to bring frontier capability to more defenders: we're working with partners to integrate Mythos 5 into their security products and services, our new Defender Advantage Fund provides $35M in credits for open-source security, and we're expanding our Cyber

• @dani_avila7 Daniel San on x

  Finally got access to Mythos! Time to put it to the test with Claude Security and see how powerful it really is If you want to understand how Claude Security works under the hood, including its agentic scanners and how findings are generated We wrote a full walkthrough here:

• @claudeai Claude on x

  Suggested patches open in Claude Code on the web, using the models your team already uses. These updates are part of our work to give defenders greater access to Mythos results without requiring direct access to the model: the model runs behind the scan and returns findings only.

• Mike Wilkes Mike Wilkes on linkedin

  Mythos 5 is public.  But what's in a name really?  Claude Security is a way to spend tokens to fix the bugs and defects in the code that Claude wrote with your tokens. …

• @sungkim Sung Kim on bluesky

  Anthropic, a month ago: Mythos is too dangerous for public use.  —  Anthropic, now: If you're willing to pay us enough money, you can use it.  —  claude.com/blog/bringin...