What Is Chain of Thought Prompting?
Chain of Thought (CoT) prompting asks the AI to show its reasoning step by step before giving the final answer. This is especially powerful for complex problems.
Basic CoT
Simply add: "Think through this step by step" or "Show your reasoning before answering."
Why It Works
For complex tasks, forcing step-by-step reasoning:
- Reduces errors by ~30% in math and logic
- Makes the reasoning auditable
- Helps you identify where the AI's logic goes wrong
Advanced CoT Techniques
Zero-Shot CoT
Add "Let's think step by step" to any prompt — no examples needed.
Few-Shot CoT
Provide 1-2 examples of step-by-step reasoning before your actual question.
Self-Consistency
Ask the AI to reason through the problem 3 different ways, then compare the answers.
When to Use CoT
- Math and logic problems
- Complex decision-making
- Code debugging
- Financial analysis
- Strategic planning
When NOT to Use CoT
- Simple factual questions
- Creative writing
- Tasks where process doesn't matter
Example
Without CoT: "What's the best marketing strategy for my startup?" With CoT: "Think step by step: 1) Analyze my startup's situation, 2) Identify target audience, 3) Evaluate channel options, 4) Recommend the best strategy with reasoning."
Next Steps
Explore our business planning prompts to practice CoT prompting.