Service update · Anthropic
Typing ultrathink in Claude Code now raises effort to xhigh for one turn
- Announcement time
- Review updated
Typing ultrathink in a message raises Claude Code's effort to xhigh for that one turn only, so you can think harder on one problem without changing the setting for the whole session. You can also now tell Claude which effort level to run a subagent at, for example medium while your session stays on high.