in my experience (N=4), Opus 4.6 talks to Claude subagents using ALL CAPS like 2022 LinkedIn prompting influence with very specific tasks to do and ways to do them. I gave Claude a Codex subagent and Opus treated Codex totally differently: no all caps at all, and open-endedness (letting the Codex subagent make decisions)
quotes: 2020519671594639374
same thread: 2031940194174451938
cited on: claude-opus-4-6
Reproduced against link rot, credited and linked to its original. Yours and you’d rather it weren’t here? Open an issue.