You're posting this comment on a thread attached to an article where Filippo Valsorda - a noted cryptography expert - used these tools to track down gnarly bugs in Go cryptography code.
They're also using "AI SAST tools", which: I would not expect anything branded as a "SAST" tool to find interesting bugs. SAST is a term of art for "pattern matching to a grocery list of specific bugs".
Which low level code base have you tried this latest tool on? Official Anthropic commercials do not count.