Using multiple older open weights models can find all the security issues that have been found by Mythos.

However, no single model of those could find everything that was found by Mythos.

https://aisle.com/blog/ai-cybersecurity-after-mythos-the-jag...

Nevertheless, the distance between free models and Mythos is not so great as claimed by the Anthropic marketing, which of course is not surprising.

In general, this is expected to be also true for other applications, because no single model is equally good for everything, even the SOTA models, trying multiple models may be necessary for obtaining the best results, but with open weights models trying many of them may add negligible cost, especially if they are hosted locally.