Anthropic Advises Dropping Old Prompting Habits

Anthropic states that outdated prompting habits slow down Claude Opus 5.5, now the default on Pro, Max, Ultra, and Team plans. The company advises removing phrases like 'think hard' and starting at the 'Medium' effort level, which matches the predecessor's 'High' performance. Users should describe goals in a single message and attach diagrams as images instead of typing them out.