Mythos is supposedly good at security research.
Local Qwen 3.6 27B can hardly debug 5 lines of CSS or copy a short snippet from A to B without mangling it.
It's not like you can use the local model for security research or engineering biological weapons.
If you have $200k maybe you can get the hardware to run the larger open source models, but even they are behind latest proprietary models.
I asked local qwen 3.6 what language my project was written in. It was a Java project, and it came back with C#. So I guess its pretty close.