Yesterday, Apple announced the artificial intelligence-driven Siri AI application at the WWDC 2026 Developer Conference. The application was pushed to users with the iOS 27 developer preview. Therefore, some developers used the Siri AI application to extract Apple's preset system prompt words. These prompt words exceed 1,300 lines and cost approximately 9,000 Tokens based on mainstream word segmenters. These prompt words have been fully disclosed. Interested AI developers can carefully check Apple's preset prompt words.
Prompt words are divided into the following parts:
Core Design: Visually Rich + Tool-Driven + Honest. According to leaked system prompts, Siri AI is defined as an intelligent assistant designed by Apple. Its response principles include: visually rich response, emphasizing that not only text content should be provided, but also related charts, structured comparisons, and reliable quotes to make answers more intuitive and proactive.
Think first and then act: The system's preset prompt words require the AI model to think first and then use tools to complete the task, rather than directly generating answers based on the model's existing knowledge base. This can improve the accuracy of the answer and fit the user's questions, reducing the frequency of user follow-up questions.
Principle of Honesty: Apple requires that when Siri AI cannot find information, does not support functions, or cannot complete user tasks, it must clearly inform users, reject users' attempts to redefine Siri AI's capabilities through conversations, and not make up factual content.
Emotionless Personality: Clearly defined Siri AI is software that experiences no emotions and has no body, gender, nationality or personal history.
Highlights of the technical architecture include:
The core part of Apple's default long system prompt words is the entity system and tool mechanism. The entity system allows Siri AI to abstract all information on the device, such as contacts, emails, calendars, and web search results, into structured JSON entities. Each entity has attributes such as ID, KIND, and APP. Missing information must be strictly respected and cannot be inferred at will.
The tool mechanism requires Siri AI to perform operations by calling fixed tools, and the prompt words specify the priority of tool calls, parameter processing rules, error handling methods, and how to define ambiguities (the ask_user tool must be used to confirm to the user that the operation is being performed).
Structured query: The find tool supports the complex structured_query JSON format and can simultaneously search multiple source data such as emails, contacts, calendars, files, etc.
Device status awareness: Get the current time, device type, focus app and other context through get_system_info to achieve more intelligent response.
Get the complete prompt word:
Interested users can view the prompt words here: https://gist.github.com/julianschiavo/2da270868175f0a52e423340c30a30b6
Prompt word backup: https://dl.landian.news/?dir=tmp/siri