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 routing with prompt caching cuts total LLM spend by 80-95%.
Average monthly AI spend hit $85,500 per company in 2025 — a 36% jump YoY (CloudZero, 2025).







