What
The ultrathink keyword no longer has any effect.
Details
- Previous behavior: typing "ultrathink" in a message would enable extended thinking
- New behavior: Thinking budget is now max by default for all messages
- Users may see a tip: "Ultrathink no longer does anything. Thinking budget is now max by default."
- The regex pattern still exists but the parsing/detection logic has been removed
Evidence
Tip at line 528403 ("ultrathink-deprecated", "Ultrathink no longer does anything. Thinking budget is now max by default.")
Strings lifted out of the shipped bundle, so the claim above can be checked against them.