How to Cut Your Claude API Bill by 60% Without Losing Quality

The author shares their strategy to reduce their monthly Claude API costs by 60% without compromising quality. The key was routing prompts to different models based on task complexity.

Details

The author was spending $45/month on the Claude API, with most of the tokens being used for simple tasks that didn't require the full reasoning capabilities of the Opus model. By analyzing their usage, they found that around 80% of their prompts were for simple edits, imports, and typo fixes. They tried pinning everything to the cheaper Sonnet model, but quality suffered on more complex tasks. Manually switching models per task also didn't work well due to decision fatigue. The solution was to implement a routing approach, where they would classify the task before sending it to the appropriate model - Haiku for quick edits, Sonnet for standard coding tasks, and Opus only for complex architecture decisions, debugging, and multi-system design. This resulted in a 60% reduction in monthly spend while maintaining quality on the critical tasks. The author also notes that the tokenizer changes in Opus 4.7 make this routing approach even more relevant, as the same prompts now use 33-50% more tokens, further increasing the cost savings of using the cheaper models for simpler tasks.