For Developers
Prompt Optimization Guide
Reduce token count without sacrificing quality - save money and improve performance.
6 min readUpdated Feb 1, 2026
Prompt Optimization Guide
Reduce token count without sacrificing quality.
Before vs. After
// Before: 156 tokens
const badPrompt = "You are a helpful assistant. Please help the user with their question. Be friendly and thorough in your response. Make sure to consider all aspects of the question and provide a comprehensive answer."
// After: 23 tokens
const goodPrompt = "You are a concise technical assistant."Result: 85% token reduction
Key Techniques
- **Remove filler phrases** - "Please", "I'd like you to", "Could you"
- **Use direct instructions** - "Summarize" not "Can you summarize"
- **Limit examples** - 1-2 few-shot examples, not 5
- **Be specific** - "List 3 reasons" not "List some reasons"
Testing Protocol
- Create A/B test with original vs. optimized prompt
- Measure quality metrics (accuracy, relevance)
- Compare token costs
- Document winning variations
Savings Calculator
| Original Tokens | Optimized | Calls/Day | Monthly Savings |
|---|---|---|---|
| 500 | 200 | 1000 | ~$18 |
| 1000 | 400 | 1000 | ~$36 |
| 2000 | 800 | 1000 | ~$72 |