Anthropic makes Claude Opus 5.5 the default and says to drop "think hard"
Opus 5.5 is now the default on Pro, Max, Ultra and Team plans. Anthropic says older prompting habits slow it down, and it recommends starting at Medium effort.
For you: If you are on a Pro, Max, Ultra or Team plan, you are now using Opus 5.5 by default, and Anthropic says you can cut "think hard" phrases and stay on Medium effort unless results fall short. If you often run Sonnet at "Extra High" or "Max" effort, Anthropic says you end up paying about as much as you would with Opus 5.5.