Implement Multi-Step Reasoning for Complex AI Tasks

1. 1
   Identify a Complex Problem

   Start with a question that requires multiple logical steps or calculations. A simple, direct prompt often fails on these, establishing the need for Multi-Step Reasoning. For example: 'A bat and a ball cost $1.10 in total. The bat costs $1.00 more than the ball. How much does the ball cost?'
2. 2
   Prompt for Step-by-Step Decomposition

   Modify your prompt to explicitly ask the AI to break down its thinking. The simplest way is to add 'Let's think step by step.' at the end. This triggers the model's 'chain of thought' process, exposing its reasoning path.
3. 3
   Incorporate Intermediate Verification

   Enhance the prompt to make the AI check its work. After asking it to think step-by-step, instruct it to verify each logical deduction or calculation before moving to the next. This is a core part of robust Multi-Step Reasoning that helps prevent cascading errors.
4. 4
   Synthesize the Final Conclusion

   Add a final instruction to your prompt. After the step-by-step analysis, ask the model to synthesize all the intermediate steps into a clear, final answer. This ensures the output is concise and directly addresses the original question.

# Prerequisites:
# 1. Install the openai library: pip install openai
# 2. Set your OpenAI API key as an environment variable: export OPENAI_API_KEY='your-key-here'

import os
from openai import OpenAI

# Initialize the client. It will automatically pick up the API key from the environment.
client = OpenAI()

# This prompt structure implements Multi-Step Reasoning by asking for
# step-by-step decomposition, intermediate logic, and a final synthesized answer.
multi_step_prompt = """
Solve the following logic puzzle. I have 5 boxes with different colors.

1. The red box is to the left of the green box.
2. The blue box is to the right of the yellow box.
3. The green box is between the purple and red boxes.
4. The yellow box is to the left of the purple box.

What is the order of the boxes from left to right?

Let's think step by step, analyzing each clue and building the sequence. After your analysis, state the final order clearly.
"""

try:
    response = client.chat.completions.create(
        model="gpt-4o",
        messages=[
            {
                "role": "system",
                "content": "You are a helpful assistant that solves logic puzzles by thinking step-by-step."
            },
            {
                "role": "user",
                "content": multi_step_prompt
            }
        ],
        temperature=0
    )

    print("--- AI's Reasoning Process ---")
    print(response.choices[0].message.content)

except Exception as e:
    print(f"An error occurred: {e}")
    print("Please ensure your OPENAI_API_KEY environment variable is set correctly.")