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Sincerely, I respect your response to how arbitrary it seems in this form.

But... I'd like you to take a moment and think really hard about whether this is truly novel behavior for LLMs, or rather something that has always been part of the interplay between inter-agent communication and intra-agent thought :)



It sounds like it is a “specific phrase mapped directly” based on another comment here? I guess that means hardcoded? Not completely sure, though.


It's hard-coded - this isn't a weird model thing, Claude Code detects the exact string "ultrathink" and sets the thinking token budget to 31999.

I included that de-obfuscated code in my post: https://simonwillison.net/2025/Apr/19/claude-code-best-pract...




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