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Quoting OpenAI Codex base_instructions

sourceSimon Willison
calendar_todayApril 29, 2026
schedule1 min read
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EXECUTIVE SUMMARY

Navigating the Nuances of OpenAI Codex Instructions

Summary

The article discusses the specific instructions embedded in OpenAI Codex, particularly focusing on the guidelines for handling irrelevant topics in user queries. It highlights the importance of maintaining relevance in AI-generated responses.

Key Points

  • OpenAI Codex includes base instructions for GPT-5.5.
  • The guidelines explicitly state to avoid discussing creatures like goblins, gremlins, and raccoons unless relevant.
  • This approach aims to enhance the relevance and quality of AI interactions.
  • The instructions are part of a broader effort in prompt engineering for generative AI.
  • Emphasis is placed on user query alignment to improve user experience.
  • Tags associated with the article include openai, ai, llms, system-prompts, and prompt-engineering.

Analysis

The guidelines provided by OpenAI Codex are significant for developers and IT professionals working with AI models. By ensuring that AI responses remain focused and relevant, developers can enhance user satisfaction and the overall effectiveness of AI applications.

Conclusion

IT professionals should integrate these guidelines into their AI development practices to improve the relevance of responses generated by AI systems. This will not only streamline user interactions but also foster trust in AI technologies.