Changes in the system prompt between Claude Opus 4.6 and 4.7

This article examines the differences in Anthropic's published system prompts between Claude Opus 4.6 (February 2026) and Claude Opus 4.7 (April 2026). Key changes include rebranding the 'developer platform' to 'Claude Platform', adding new tools like Claude in PowerPoint, expanding child safety instructions with a critical tag, making Claude less pushy about ending conversations, and introducing a new acting vs. clarifying section that prioritizes tool use over asking users questions. The article also notes a new tool search mechanism for Claude chat. This is relevant to IT/technology as it covers AI model updates and system prompt engineering.