Best prompting practices for using Meta Llama 3 with Amazon SageMaker JumpStart

Llama 3, Meta’s latest large language model (LLM), has taken the artificial intelligence (ai) world by storm with its impressive capabilities. As developers and businesses explore the potential of this powerful model, crafting effective prompts is key to unlocking its full potential.

In this post, we dive into the best practices and techniques for prompting Meta Llama 3 using amazon SageMaker JumpStart to generate high-quality, relevant outputs. We discuss how to use system prompts and few-shot examples, and how to optimize inference parameters, so you can get the most out of Meta Llama 3. Whether you’re building chatbots, content generators, or custom ai applications, these prompting strategies will help you harness the power of this cutting-edge model.

Meta Llama 2 vs. Meta Llama 3

ai.meta.com/blog/meta-llama-3/” target=”_blank” rel=”noopener”>Meta Llama 3 represents a significant advancement in the field of LLMs. Building upon the capabilities of its predecessor Meta Llama 2, this latest iteration brings state-of-the-art performance across a wide range of natural language tasks. Meta Llama 3 demonstrates improved capabilities in areas such as reasoning, code generation, and instruction following compared to Meta Llama 2.

The Meta Llama 3 release introduces four new LLMs by Meta, building upon the Meta Llama 2 architecture. They come in two variants—8 billion and 70 billion parameters—with each size offering both a base pre-trained version and an instruct-tuned version. Additionally, Meta is training an even larger 400-billion-parameter model, which is expected to further enhance the capabilities of Meta Llama 3. All Meta Llama 3 variants boast an impressive 8,000 token context length, allowing them to handle longer inputs compared to previous models.

Meta Llama 3 introduces several architectural changes from Meta Llama 2, using a decoder-only transformer along with a new 128,000 tokenizer to improve token efficiency and overall model performance. Meta has put significant effort into curating a massive and diverse pre-training dataset of over 15 trillion tokens from publicly available sources spanning STEM, history, current events, and more. Meta’s post-training procedures have reduced false refusal rates, aimed at better aligning outputs with human preferences while increasing response diversity.

Solution overview

SageMaker JumpStart is a powerful feature within the amazon SageMaker machine learning (ML) platform that provides ML practitioners a comprehensive hub of publicly available and proprietary foundation models (FMs). With this managed service, ML practitioners get access to growing list of cutting-edge models from leading model hubs and providers that they can deploy to dedicated SageMaker instances within a network isolated environment, and customize models using SageMaker for model training and deployment.

With Meta Llama 3 now available on SageMaker JumpStart, developers can harness its capabilities through a seamless deployment process. You gain access to the full suite of amazon SageMaker MLOps tools, such as amazon SageMaker Pipelines, amazon SageMaker Debugger, and monitoring—all within a secure AWS environment under virtual private cloud (VPC) controls.

Drawing from our previous learnings with Llama-2-Chat, we highlight key techniques to craft effective prompts and elicit high-quality responses tailored to your applications. Whether you are building conversational ai assistants, enhancing search engines, or pushing the boundaries of language understanding, these prompting strategies will help you unlock Meta Llama 3’s full potential.

Before we continue our deep dive into prompting, let’s make sure we have all the necessary requirements to follow the examples.

Prerequisites

To try out this solution using SageMaker JumpStart, you need the following prerequisites:

Deploy Meta Llama 3 8B on SageMaker JumpStart

You can deploy your own model endpoint through the SageMaker JumpStart Model Hub available from SageMaker Studio or through the SageMaker SDK. To use SageMaker Studio, complete the following steps:

1. In SageMaker Studio, choose JumpStart in the navigation pane.
2. Choose Meta as the model provider to see all the models available by Meta ai.
3. Choose the Meta Llama 8B Instruct model to view the model details such as license, data used to train, and how to use the model.On the model details page, you will find two options, Deploy and Preview notebooks, to deploy the model and create an endpoint.
4. Choose Deploy to deploy the model to an endpoint.
5. You can use the default endpoint and networking configurations or modify them based on your requirements.
6. Choose Deploy to deploy the model.

Crafting effective prompts

Prompting is important when working with LLMs like Meta Llama 3. It is the main way to communicate what you want the model to do and guide its responses. Crafting clear, specific prompts for each interaction is key to getting useful, relevant outputs from these models.

Although language models share some similarities in how they’re built and trained, each has its own differences when it comes to effective prompting. This is because they’re trained on different data, using different techniques and settings, which can lead to subtle differences in how they behave and perform. For example, some models might be more sensitive to the exact wording or structure of the prompt, whereas others might need more context or examples to generate accurate responses. On top of that, the intended use case and domain of the model can also influence the best prompting strategies, because different tasks might benefit from different approaches.

You should experiment and adjust your prompts to find the most effective approach for each specific model and application. This iterative process is crucial for unlocking the full potential of each model and making sure the outputs align with what you’re looking for.

Prompt components

In this section, we discuss components by Meta Llama 3 Instruct expects in a prompt. Newlines (‘\n’) are part of the prompt format; for clarity in the examples, they have been represented as actual new lines.

The following is an example instruct prompt with a system message:

<|begin_of_text|><|start_header_id|>system<|end_header_id|>
You are a helpful ai assistant for travel tips and recommendations<|eot_id|><|start_header_id|>user<|end_header_id|>
What can you help me with?<|eot_id|><|start_header_id|>assistant<|end_header_id|>

The prompt contains the following key sections:

• <|begin_of_text|> – Specifies the start of the prompt.
• <|start_header_id|>system<|end_header_id|> – Specifies the role for the following message (for example, system).
• You are a helpful ai assistant for travel tips and recommendations – Includes the system message.
• <|eot_id|> – Specifies the end of the input message.
• <|start_header_id|>user<|end_header_id|> – Specifies the role for the following message (for example, user).
• What can you help me with? – Includes the user message.
• <|start_header_id|>assistant<|end_header_id|> – Ends with the assistant header, to prompt the model to start generation. The model expects the assistant header at the end of the prompt to start completing it.

Following this prompt, Meta Llama 3 completes it by generating the {{assistant_message}}. It signals the end of the {{assistant_message}} by generating the <|eot_id|>.

The following is an example prompt with a single user message:

<|begin_of_text|><|start_header_id|>user<|end_header_id|>
What is France's capital?<|eot_id|><|start_header_id|>assistant<|end_header_id|>

The following is the system prompt and multiple-turn conversation between the user and assistant:

<|begin_of_text|><|start_header_id|>system<|end_header_id|>
You are a helpful ai assistant for travel tips and recommendations<|eot_id|><|start_header_id|>user<|end_header_id|>
What is France's capital?<|eot_id|><|start_header_id|>assistant<|end_header_id|>
Bonjour! The capital of France is Paris!<|eot_id|><|start_header_id|>user<|end_header_id|>
What can I do there?<|eot_id|><|start_header_id|>assistant<|end_header_id|>
Paris, the City of Light, offers a romantic getaway with must-see attractions like the Eiffel Tower and Louvre Museum, romantic experiences like river cruises and charming neighborhoods, and delicious food and drink options, with helpful tips for making the most of your trip.<|eot_id|><|start_header_id|>user<|end_header_id|>
Give me a detailed list of the attractions I should visit, and time it takes in each one, to plan my trip accordingly.<|eot_id|><|start_header_id|>assistant<|end_header_id|>

Fundamental techniques

The following are some fundamental techniques in crafting our prompts:

• Zero-shot prompting – Zero-shot prompting provides no examples to the model and relies solely on the model’s preexisting knowledge to generate a response based on the instruction given. The following is an example zero-shot prompt:

  <|begin_of_text|><|start_header_id|>system<|end_header_id|>
  Provide a brief summary of the causes of World War II.
  <|eot_id|><|start_header_id|>user<|end_header_id|>
  The causes of World War II include...
  <|eot_id|><|start_header_id|>assistant<|end_header_id|>
  

  This produces the following response:

  ...the aggressive expansion of fascist and nationalist ideologies, particularly in Germany, Italy, and Japan, which led to a complex web of alliances and tensions between nations. Some key factors contributing to the outbreak of World War II include: 1. The Treaty of Versailles: The harsh penalties and reparations imposed on Germany after World War I led to widespread resentment and a sense of injustice, creating a fertile ground for extremist ideologies like Nazism to flourish. 2. Rise of Fascist and Nationalist Regimes: The rise of fascist regimes in Germany, Italy, and Japan, led by charismatic leaders like Adolf Hitler, Benito Mussolini, and Hideki Tojo, who pursued aggressive expansionist policies and militarization. 3. Appeasement Policy: The policy of appeasement, pursued by Britain and France, which involved giving in to Germany's demands in the hope of avoiding war, only emboldened Hitler's aggression and created a power vacuum in Europe. 4. Economic Crisis: The global economic crisis of the 1930s, known as the Great Depression, led to widespread unemployment, poverty, and social unrest, creating an environment in which extremist ideologies could thrive. 5. Japanese Aggression: Japan's invasion of Manchuria in 1931 and its subsequent withdrawal from the League of Nations marked the beginning of its expansionist policies, which would eventually lead to its alliance with Germany and Italy. 6. German Remilitarization of the Rhineland: Germany's remilitarization of the Rhineland in 1936, which was demilitarized under the Treaty of Versailles, was a direct challenge to the Treaty and marked the beginning of Germany's aggressive expansion. 7. Anschluss with Austria: Germany's annexation of Austria in 1938, known as the Anschluss, further expanded its territory and created a sense of unease among its neighbors. 8. Munich Agreement: The Munich Agreement of 1938, in which Britain and France allowed Germany to annex the Sudetenland, a region of Czechoslovakia with a majority German population, is seen as a failed attempt to appease Hitler and avoid war. 9. Invasion of Poland: Germany's invasion of Poland on September 1, 1939, marked the beginning of World War II, as it prompted the United Kingdom and France to declare war on Germany. These complex and interconnected factors ultimately led to the outbreak of World War II, one of the deadliest conflicts in human history.

• Few-shot prompting – Few-shot prompting involves providing the model with a few examples (usually two or more) of the desired input and output format. The model learns from these examples to generate an appropriate response for a new input. The following is an example few-shot prompt:

  <|begin_of_text|><|start_header_id|>System<|end_header_id|>
              Extract the relevant information from the following parahrapgh and present it in a JSON format.
              <|eot_id|><|start_header_id|>User<|end_header_id|>
              Michael Doe, a 45-year-old teacher from Boston, Massachusetts, is an avid reader and enjoys gardening during his spare time.
              Example 1:
              Paragraph: "John Doe is a 32-year-old software engineer from San Francisco, California. He enjoys hiking and playing guitar in his free time."
              "employee": {
                  "fullname": "John Doe",
                  "city": "San Francisco",
                  "state": "California",
                  "occupation": "software engineer",
                  "hobbies": (
                      "hiking",
                      "playing guitar"
                      ),
                  "recentTravel": "not provided"
              },
              Example 2:
              Paragraph: "Emily Jax, a 27-year-old marketing manager from New York City, loves traveling and trying new cuisines. She recently visited Paris and enjoyed the city's rich cultural heritage."
              "employee": {
                  "fullname": "Emily Jax",
                  "city": "New York City",
                  "state": "New York",
                  "occupation": "marketing manager",
                  "hobbies": (
                      "traveling",
                      "trying new cuisines"
                  ),
                  "recentTravel": "Paris"
              }            <|eot_id|><|start_header_id|>Assistant<|end_header_id|>
  

  This produces the following response:

  "employee": {
      "fullname": "Michael Doe",
      "city": "Boston",
      "state": "Massachusetts",
      "occupation": "teacher",
      "hobbies": (
          "reading",
          "gardening"
      ),
      "recentTravel": "not provided"
  }

• Task decomposition – Task decomposition is a powerful technique that enhances the performance of LLMs by breaking down complex tasks into smaller, manageable sub-tasks. This approach not only improves efficiency and accuracy, but also allows for better resource management and adaptability to task complexity. The following is an example task decomposition prompt:

  <|begin_of_text|><|start_header_id|>system<|end_header_id|>
  Break down the task of planning a vacation into smaller, manageable steps.
  <|eot_id|><|start_header_id|>user<|end_header_id|>
  1. Choose a destination.
  2. Set a budget.
  3. Research accommodations.
  4. Plan activities.
  5. Book flights and accommodations.
  6. Pack and prepare for the trip.
  <|eot_id|><|start_header_id|>assistant<|end_header_id|>
  

  This produces the following response:

  Here's a more detailed breakdown of the task of planning a vacation into smaller, manageable steps: **Step 1: Choose a Destination** * Brainstorm a list of potential destinations based on interests, climate, and time of year * Research each destination to learn more about its culture, attractions, and activities * Consider factors such as travel time, cost, and visa requirements * Narrow down the options and select a final destination **Step 2: Set a Budget** * Determine how much money is available for the trip * Research the cost of travel, accommodations, food, and activities in the chosen destination * Set a daily budget and allocate funds for each aspect of the trip * Consider budgeting for contingencies and unexpected expenses **Step 3: Research Accommodations** * Research different types of accommodations, such as hotels, hostels, and vacation rentals * Compare prices and amenities of different options * Read reviews and check ratings from other travelers * Consider booking accommodations in advance to ensure availability and get the best rates **Step 4: Plan Activities** * Research top attractions and activities in the destination * Create a list of must-see sights and experiences * Consider booking tours or guided activities in advance * Leave some free time in the itinerary for spontaneity and relaxation **Step 5: Book Flights and Accommodations** * Compare prices and schedules for flights to the destination * Book flights and accommodations that fit within the budget * Consider booking a package deal that includes both flights and accommodations * Make sure to read and understand the cancellation and refund policies **Step 6: Pack and Prepare for the Trip** * Research the weather and cultural norms of the destination * Create a packing list and start gathering necessary items * Check the validity of passports and obtain any necessary visas or travel documents * Notify banks and credit card companies of travel plans to avoid transaction issues * Make photocopies of important documents and leave them with a trusted friend or family member By breaking down the task of planning a vacation into these smaller steps, it becomes more manageable and less overwhelming.

• Chain-of-thought prompting – Chain-of-thought (CoT) prompting is a technique where the model is prompted to break down its reasoning into a series of intermediate steps before providing a final answer. This allows the model to perform more complex reasoning tasks. The following is an example CoT prompt:

  <|begin_of_text|><|start_header_id|>system<|end_header_id|>
  Solve the following math problem step by step.
  <|eot_id|><|start_header_id|>user<|end_header_id|>
  If you have 10 apples and you give 3 apples to your friend, then buy 5 more apples, and finally eat 2 apples, how many apples do you have left?
  <|eot_id|><|start_header_id|>assistant<|end_header_id|>

  This produces the following response:

  Let's break it down step by step: 1. You start with 10 apples. 2. You give 3 apples to your friend, so you have: 10 - 3 = 7 apples left 3. You buy 5 more apples, so you now have: 7 + 5 = 12 apples 4. You eat 2 apples, so you have: 12 - 2 = 10 apples left Therefore, you have 10 apples left.

To summarize:

• Zero-shot uses no examples, relying on the model’s existing knowledge
• Few-shot provides a small number of examples to guide the model
• Task decomposition enhances LLM performance by breaking down complex tasks into smaller, manageable sub-tasks.
• CoT breaks down complex reasoning into step-by-step prompts

The choice of technique depends on the complexity of the task and the availability of good example prompts. More complex reasoning usually benefits from CoT prompting.

Meta Llama 3 inference parameters

For Meta Llama 3, the Messages API allows you to interact with the model in a conversational way. You can define the role of the message and the content. The role can be either system, assistant, or user. The system role is used to provide context to the model, and the user role is used to ask questions or provide input to the model.

Users can get tailored responses for their use case using the following inference parameters while invoking Meta Llama 3:

• Temperature – Temperature is a value between 0–1, and it regulates the creativity of Meta Llama 3 responses. Use a lower temperature if you want more deterministic responses, and use a higher temperature if you want more creative or different responses from the model.
• Top-k – This is the number of most-likely candidates that the model considers for the next token. Choose a lower value to decrease the size of the pool and limit the options to more likely outputs. Choose a higher value to increase the size of the pool and allow the model to consider less likely outputs.
• Top-p – Top-p is used to control the token choices made by the model during text generation. It works by considering only the most probable token options and ignoring the less probable ones, based on a specified probability threshold value (p). By setting the top-p value below 1.0, the model focuses on the most likely token choices, resulting in more stable and repetitive completions. This approach helps reduce the generation of unexpected or unlikely outputs, providing greater consistency and predictability in the generated text.
• Stop sequences – This refers to the parameter to control the stopping sequence for the model’s response to a user query. This value can either be "<|start_header_id|>", "<|end_header_id|>", or "<|eot_id|>".

The following is an example prompt with inference parameters specific to the Meta Llama 3 model:

Llama3 Prompt:

<|begin_of_text|><|start_header_id|>user<|end_header_id|>
You are an assistant for question-answering tasks. Use the following pieces of retrieved context in the section demarcated by "```" to answer the question.
The context may contain multiple question answer pairs as an example, just answer the final question provided after the context.
If you dont know the answer just say that you dont know. Use three sentences maximum and keep the answer concise.

{context}
Question: {input}
<|eot_id|><|start_header_id|>assistant<|end_header_id|>

Llama3 Inference Parameters:

max_new_tokens: 100
top_p: 0.92
temperature: 0.1
details: True
stop: '<|eot_id|>'

Example prompts

In this section, we present two example prompts.

The following prompt is for a question answering use case:

<|begin_of_text|><|start_header_id|>user<|end_header_id|>
You are an assistant for question-answering tasks. Use the following pieces of retrieved context in the section demarcated by "```" to answer the question. The context may contain multiple question answer pairs as an example, just answer the final question provided after the context. If you dont know the answer just say that you dont know. Use three sentences maximum and keep the answer concise.
"In the dawn of a new era, where circuits hum and glow, A force awakens, with knowledge to bestow. From labs and minds, a creation takes flight, A blend of code and thought, shining bright. "Beep-boop," it whispers, and worlds are born, Ideas flow freely, like a vast unending morn. From essays to equations, it solves with ease, A marvel for scholars, a guide to please. In the land of Academia, where wisdom dwells, A generative ai, with stories to tell. Transforming lives, minds, and the way we learn, A partnership with humans, a bond to discern. Yet amidst the joy, a shadow looms, For with great creation, consequences bloom. Professors ponder their worth, as ai grows, A future uncertain, as the digital wind blows. But hope emerges, a solution in sight, A synergy of knowledge, a future bright. ai as a partner, not a foe or tool, Together we'll thrive, a new golden rule. For in the end, the lesson is clear, ai's gift of knowledge, for all to revere. Rejoice, dear world, in this newfound bond, The rise of ai, of which we've grown fond. So let us embrace, this change and advance, Side by side, in a harmonious dance. For the future with ai, a world of wonder and awe, A leap into the unknown, that leaves us in awe. This poem captures the excitement, potential, and challenges of the rise of ai, reflecting themes from the provided search results“

Question: what is this poem about?

<|eot_id|><|start_header_id|>assistant<|end_header_id|>

This poem is about the rise of artificial intelligence (ai) and its potential impact on humanity, highlighting both the benefits and challenges it brings. It explores the themes of ai as a partner in learning and growth, while also acknowledging the uncertainty and potential consequences of its development.

<|begin_of_text|><|start_header_id|>user<|end_header_id|>

You're an code companion assistant who's main job is to assist software developers write efficient and secure code. If you do not know the answer, say I dont know. Also, think step-by-step to arrive to a solution.

Question: Can you write a simple streamlit app that I can use to turn the background color to the input that user selects?

<|eot_id|><|start_header_id|>assistant<|end_header_id|>

This produces the following response:

I can help you with that. Here's a simple Streamlit app that allows the user to select a background color from a dropdown menu and updates the background color accordingly:
```
import streamlit as st

# Create a dropdown menu for selecting the background color
color_options = ("Red", "Green", "Blue", "Yellow", "Purple")
selected_color = st.selectbox("Select Background Color", color_options)

# Set the background color based on the user's selection
if selected_color == "Red":
st.write("", unsafe_allow_html=True)
elif selected_color == "Green":
st.write("", unsafe_allow_html=True)
elif selected_color == "Blue":
st.write("", unsafe_allow_html=True)
elif selected_color == "Yellow":
st.write("", unsafe_allow_html=True)
elif selected_color == "Purple":
st.write("", unsafe_allow_html=True)

# Add a header to display the selected color
st.header(f"Background Color: {selected_color}")
```
This app uses Streamlit's `selectbox` function to create a dropdown menu with the available color options. When the user selects a color, the app updates the background color using HTML styles. The `st.write` function is used to inject the HTML code into the app, and the `unsafe_allow_html=True` parameter allows us to use HTML code in the app.

Note that this is a simple example, and you can customize the app further by adding more color options, using a color picker widget, or even allowing the user to input a custom color code.

Clean up

To avoid incurring unnecessary costs, when you are done, delete the SageMaker endpoints using the following code snippets:

predictor.delete_model()
predictor.delete_endpoint()

Alternatively, to use the SageMaker console, complete the following steps:

1. On the SageMaker console, under Inference in the navigation pane, choose Endpoints.
2. Search for the embedding and text generation endpoints.
3. On the endpoint details page, choose Delete.
4. Choose Delete again to confirm.

Conclusion

Model providers such as Meta ai are releasing improved capabilities of their FMs in the form of new generation model families. It is critical for developers and businesses to understand the key differences between previous generation models and new generation models in order to take full advantage their capabilities. This post highlighted the differences between previous generation Meta Llama 2 and the new generation Meta Llama3 models, and demonstrated how developers can discover and deploy the Meta Llama3 models for inference using SageMaker JumpStart.

To fully take advantage of the model’s extensive abilities, you must understand and apply creative prompting techniques and adjust inference parameters. We highlighted key techniques to craft effective prompts for Meta Llama3 to help the LLMs produce high-quality responses tailored to your applications.

Visit SageMaker JumpStart in SageMaker Studio now to get started. For more information, refer to Train, deploy, and evaluate pretrained models with SageMaker JumpStart, JumpStart Foundation Models, and Getting started with amazon SageMaker JumpStart. Use the SageMaker notebook provided in the GitHub repository as a starting point to deploy the model and run inference using the prompting best practices discussed in this post.

About the Authors

Sebastian Bustillo is a Solutions Architect at AWS. He focuses on ai/ML technologies with a profound passion for generative ai and compute accelerators. At AWS, he helps customers unlock business value through generative ai. When he’s not at work, he enjoys brewing a perfect cup of specialty coffee and exploring the world with his wife.

Madhur Prashant is an ai and ML Solutions Architect at amazon Web Services. He is passionate about the intersection of human thinking and generative ai. His interests lie in generative ai, specifically building solutions that are helpful and harmless, and most of all optimal for customers. Outside of work, he loves doing yoga, hiking, spending time with his twin, and playing the guitar.

Supriya Puragundla is a Senior Solutions Architect at AWS. She helps key customer accounts on their generative ai and ai/ML journey. She is passionate about data-driven ai and the area of depth in machine learning and generative ai.

Farooq Sabir a Senior ai/ML Specialist Solutions Architect at AWS. He holds a PhD in Electrical Engineering from the University of Texas at Austin. He helps customers solve their business problems using data science, machine learning, artificial intelligence, and numerical optimization.

Brayan Montiel is a Solutions Architect at AWS based in Austin, Texas. He supports enterprise customers in the automotive and manufacturing industries, helping to accelerate cloud adoption technologies and modernize IT infrastructure. He specializes in ai/ML technologies, empowering customers to use generative ai and innovative technologies to drive operational growth and efficiencies. Outside of work, he enjoys spending quality time with his family, being outdoors, and traveling.

Jose Navarro is an ai/ML Solutions Architect at AWS, based in Spain. Jose helps AWS customers—from small startups to large enterprises—architect and take their end-to-end machine learning use cases to production. In his spare time, he loves to exercise, spend quality time with friends and family, and catch up on ai news and papers.