#12 Analysis of System Prompt Changes in Anthropic Claude Opus 4.7
Anthropic has updated the Claude.ai system prompt with the release of Claude Opus 4.7 on April 16, 2026, compared to Opus 4.6 on February 5, 2026. Key changes include renaming "developer platform" to "Claude Platform," adding new tools like "Claude in Chrome," "Claude in Excel," and "Claude in Powerpoint," significantly expanding child safety instructions under a new <critical_child_safety_instructions> tag, and programming Claude to respect user's explicit intentions to end conversations. The prompt now includes <acting_vs_clarifying> guidance, prioritizing tool use to resolve ambiguity, and utilizes a "tool_search" mechanism. Responses are encouraged to be more concise, directiveness against using emotes within asterisks is reinforced, new guidance addresses "disordered eating," and safeguards are in place to prevent simple "yes/no" answers to complex or contested issues.