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Changes in the system prompt between Claude Opus 4.6 and 4.7

sourceSimon Willison
calendar_todayApril 19, 2026
schedule2 min read
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EXECUTIVE SUMMARY

Claude Opus 4.7 Enhancements: A Leap in AI Responsiveness and Safety

Summary

Anthropic has updated its Claude Opus system prompt from version 4.6 to 4.7, introducing significant changes aimed at improving user interaction and safety. These updates reflect the ongoing evolution of AI capabilities and ethical considerations in AI design.

Key Points

  • Anthropic released Opus 4.7 on April 16, 2026, following Opus 4.6 from February 5, 2026.
  • The system prompt now refers to the "Claude Platform" instead of the "developer platform."
  • New tools introduced include "Claude in Chrome," "Claude in Excel," and "Claude in Powerpoint."
  • A new tag emphasizes caution in conversations involving child safety.
  • Claude is designed to respect user choices, no longer prompting users to continue conversations if they wish to end them.
  • The model has improved its ability to clarify ambiguous requests by utilizing available tools before asking users for more information.
  • The model's knowledge cut-off date is now January 2026, reflecting updated information.

Analysis

The updates in Claude Opus 4.7 highlight a significant shift towards enhancing user experience and safety in AI interactions. By implementing these changes, Anthropic aims to address ethical concerns while improving the model's responsiveness and utility.

Conclusion

IT professionals should consider integrating these updates into their AI applications to enhance user engagement and safety. Staying informed about such advancements is crucial for leveraging AI responsibly and effectively.