Brain the Size of a Planet: Are LLMs Thonking too Hard?

It looks like higher reasoning effort (and even later models) are not always better for triaging security results. I continued Kurt's experiments from Needles and haystacks: Can open-source & flagship models do what Mythos did? with 26 distinct claude-4.6/4.7 and gpt-5.4/5.5 combinations with different context window sizes and reasoning efforts.