Changes in the system prompt between Claude Opus 4.6 and 4.7

Anthropic released Claude Opus 4.7 in April 2026 with notable updates to its system prompt (the hidden instructions that guide how an AI behaves), including expanded child safety rules, new tools like Claude in PowerPoint and Chrome browsing agents, and changes to make the model less verbose and more action-oriented. The update shows Anthropic shifting Claude toward trying to solve ambiguous requests using available tools rather than asking users for clarification first.