We Tracked 1M LLM API Calls — 60% Were Wasting Money on the Wrong Model

Key Takeaways 82% of developers default to OpenAI GPT models (Stack Overflow Developer Survey, 2025), but 60-70% of production API calls don't need a frontier model. Switching classification calls from GPT-4o to DeepSeek V3 saves 18x on input tokens ($2.50 → $0.14 per million). Combining model routi