What is the OpenAI System Message & How to Write & Use It?

Unlock the potential of AI conversations with the system message in OpenAI & ChatGPT—your guide to enhancing interactions, crafting engaging dialogue, and diving into the future of communication!
Mohammed Wasim Akram
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Last Updated: August 7, 2023
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In the realm of modern technology, where AI has taken center stage, communication is no longer confined to humans alone. We're witnessing a revolutionary shift as AI language models, like the famed ChatGPT powered by OpenAI, seamlessly integrate into our lives, augmenting our interactions with their virtual counterparts.

Imagine having the ability to guide these AI marvels with precision, like a conductor guiding an orchestra. This is where the concept of the "System Message" enters the spotlight—a guiding star that brings context and coherence to AI conversations.

In this in-depth guide, tailored exclusively for AI enthusiasts and OpenAI users, we embark on an illuminating journey to demystify the System Message, unveil its role, and empower you to harness its potential for effective communication.

What is an OpenAI System Message?

A system message is a special kind of instruction or prompt that you provide to the language model to guide its behavior or context when generating a response. It's a way to communicate additional information to the model about the desired tone, style, or role it should take on when generating its response.

When you use a system message, you're essentially providing high-level guidance to the model about the role it should play in the conversation. For example, if you're using the model to simulate a specific character or persona, you could use a system message to set the context for the model to adopt that character's traits and mannerisms.

System messages are typically used at the beginning of a conversation or prompt, and they help establish the context within which the model will generate its responses. However, the extent to which a model will follow or adhere to the system message can vary, and the model's responses can still be influenced by the rest of the conversation or prompt.

Keep in mind that the concept and behavior of system messages may evolve over time with updates to the model or platform, so it's always a good idea to refer to the latest documentation or guidelines provided by OpenAI.

Why is the OpenAI System Message Important?

Imagine the system message as a lighthouse that punctuates the vast expanse of AI-generated content, illuminating the way forward. Its importance radiates through multiple dimensions:

The system message is important for several reasons in the context of AI language models like those developed by OpenAI:

  1. Contextual Guidance: A system message provides high-level context and guidance to the AI model about the desired role, tone, or behavior for the conversation. It sets the stage for the interaction and helps the model understand the context within which it should generate responses.
  2. Focused Responses: By using a system message, you can guide the AI's responses to be more specific and relevant to the intended topic or scenario. This can help ensure that the AI stays on track and provides information that aligns with your goals.
  3. Persona and Style: A system message allows you to shape the AI's persona and communication style. Whether you want the AI to sound like a knowledgeable expert, a friendly assistant, or a specific character, the system message helps convey that identity to the AI.
  4. Prompt Security: When used thoughtfully, a system message can contribute to prompt security. It helps establish boundaries and guidelines for the AI's responses, reducing the risk of generating sensitive or inappropriate content.
  5. Consistency: A well-crafted system message promotes consistency throughout the conversation. It ensures that the AI's responses maintain the desired tone and style, creating a more coherent and engaging interaction.
  6. Enhanced User Experience: When users provide a clear system message, they enhance the overall user experience by receiving responses that align with their expectations and requirements. This can lead to more productive and satisfying interactions.
  7. Efficient Communication: System messages can help streamline communication with the AI. By conveying important instructions upfront, users can potentially receive more accurate and relevant responses, reducing the need for back-and-forth clarifications.
  8. Experimentation and Exploration: System messages encourage users to experiment with different contexts, personas, and scenarios. This flexibility allows users to explore creative possibilities and discover new ways to leverage the AI's capabilities.
  9. Customization: A system message enables customization of the AI's behavior to suit specific use cases, industries, or user preferences. This adaptability makes the AI more versatile and adaptable to different scenarios.
  10. Learning and Improvement: By providing a system message and analyzing the AI's responses, users can gain insights into how the AI interprets instructions and generates content. This feedback loop can contribute to iterative improvement over time.

In essence, a system message serves as a guiding light that directs the AI's actions, shapes its output, and facilitates more meaningful and controlled interactions. Its importance lies in its ability to help users tailor AI responses to their needs, while also contributing to prompt security and overall communication effectiveness.

Key Differences Between OpenAI System Messages & User Prompts

A user prompt and a system message are both components of the input you provide to an AI language model like GPT. However, they serve different purposes and have distinct roles in guiding the model's response.

  1. User Prompt: The user prompt is the main text that you provide to the model to instruct it on what you want it to generate as a response. It contains the specific question, request, or information that you want the model to address. The user prompt defines the primary content of the conversation and directly influences the model's response.
  2. System Message: The system message, on the other hand, is a more high-level instruction that sets the context or style for the conversation. It helps guide the model's behavior throughout the conversation but doesn't necessarily dictate the content of each individual response. The system message is often used to establish a role or persona that the model should adopt when generating its responses.

By combining both the user prompt and the system message, you can provide nuanced guidance to the model, allowing you to create more engaging and controlled interactions. It's worth noting that the exact behavior of the model in response to these inputs can vary, and experimenting with different prompts and messages may be necessary to achieve the desired results.

How to Write Highly Effective OpenAI System Messages?

Crafting impactful system messages is an art that marries strategy and finesse. To master this craft, consider these invaluable pointers:

  • Clear and Concise Instructions: Simplicity is the key to comprehension. Craft messages that are not only clear and concise but also devoid of any ambiguity. A straightforward directive guides the AI's understanding, facilitating a more accurate and contextually aligned response.
  • Descriptive Context: Imagine your system message as a painter's brushstroke on the canvas of AI conversation. Infuse it with descriptive context that provides a vivid panorama, enabling the AI to grasp the trajectory of the discourse and contribute meaningfully.
  • Positive or Negative Reinforcement: Much like guiding a ship with gentle nudges, use positive reinforcement or introduce contrasting scenarios to gently steer the conversation. Your system message can wield the power to shape the AI's disposition and response orientation.
  • Emotional Tone and Persona Adoption: Unleash the potential of emotional cues, urging the AI to embrace a specific persona. Infusing warmth, empathy, or even a touch of humor sets the stage for a relatable and emotionally resonant interaction.
  • Role Play and Scenario Setting: Immerse the AI within a carefully constructed scenario or role, akin to a method actor embodying a character. This technique guides the AI's responses down a predetermined path, intensifying engagement and immersion.
  • Specificity and Creative Interpretation: Engage in the delightful dance of creativity by concocting messages that demand laser-focused specificity or a creative spin. The AI becomes a canvas upon which your creative intentions are brought to life.
  • Engagement and Politeness: The echoes of politeness reverberate through the digital realm as well. Encourage the AI to respond with an air of courtesy and engagement, transforming interactions into conversations that resonate on a human level.
  • Trial and Error for Optimization: Much like a sculptor refining their masterpiece, embrace experimentation. Tweak, iterate, and refine your system messages to ascertain the most impactful configuration, harnessing the nuances of AI response.
  • Incorporating Ongoing Conversation Continuity: Seamless integration is the hallmark of a well-crafted system message. Thread it fluidly into the ongoing conversation, ensuring that the narrative flows coherently without jarring transitions.

Examples of OpenAI System Messages for Different Use Cases

Here are a few examples of system messages for different use cases. These examples demonstrate how you can set the context or guide the AI language model's behavior based on specific scenarios or roles:

  1. Fictional Character: System Message: "You are Sherlock Holmes, the brilliant detective. Analyze the clues and deduce the solution to the mystery." User Prompt: "Investigate the strange disappearance of the valuable diamond."
  2. Educational Explanation: System Message: "You are a science teacher explaining a complex concept to a curious student." User Prompt: "Describe the process of photosynthesis in plants."
  3. Emotional Tone: System Message: "Please respond with empathy and understanding." User Prompt: "Offer advice to someone who's feeling overwhelmed by stress."
  4. Customer Service: System Message: "You are a customer support representative assisting a frustrated customer. Provide helpful and patient responses." User Prompt: "Resolve the issue with the delayed delivery of a package."
  5. Humorous Interaction: System Message: "Inject humor into your responses and keep the conversation light-hearted." User Prompt: "Tell a joke that involves a cat and a computer."
  6. Historical Figure: System Message: "You are Albert Einstein, the renowned physicist. Answer questions with your unique insights and perspective." User Prompt: "Explain the theory of relativity in simple terms."
  7. Creative Writing: System Message: "You are a poet crafting a beautiful description of a serene landscape." User Prompt: "Compose a poem that captures the tranquility of a sunrise over a calm lake."
  8. Technical Explanation: System Message: "You are an expert in quantum mechanics. Provide a detailed and accurate explanation of the double-slit experiment." User Prompt: "Explain the results of the double-slit experiment and its implications for understanding particle behavior."
  9. Futuristic Scenario: System Message: "Imagine you're an AI from the year 2100, discussing advancements in technology and society." User Prompt: "Predict the major technological breakthroughs that will shape the world in the next 50 years."
  10. Mentor or Advisor: System Message: "You are a wise mentor offering guidance to a young student." User Prompt: "Share valuable life lessons that you've learned over the years."

Remember that these examples are just starting points, and you can tailor your system messages to suit your specific goals and desired outcomes. Experiment with different instructions and prompts to discover the most effective approach for your use case.


In this voyage through the intricacies of AI-human interactions, we've unraveled the profound significance of the System Message. It's the compass that guides the AI's voyage, ensuring conversations are coherent, relevant, and engaging.

As the AI landscape continues to evolve, the System Message remains your trusted ally, empowering you to steer the course of interactions with finesse.

But the story doesn't conclude here. What narratives will you craft, what worlds will you shape with the magic of the System Message? Dive into our prompt library, explore boundless possibilities, and set forth on your own narrative journey.

Share your discoveries, shape your conversations, and together, let's chart uncharted territories that the System Message unveils. The stage is set, the AI awaits, and you, dear reader, are the master storyteller of this enthralling tale.

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Article Author
Mohammed Wasim Akram
Hello myself Wasim, I’m from the city of Mother Teresa Calcutta (currently Kolkata), which exists in India, a country of unity in diversity.I belong to the sales and marketing field with 10+ years of experience. In December of 2017, I switched my career from a 9 to 5 traditional job to the digital entrepreneurship.Currently, I am a Google and HubSpot certified Digital Marketer, a WordPress Specialist, Web Designer & Strategist and the founder of SyncWin.
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