Symptoms:
Cost issues often become apparent when daily token usage suddenly doubles, and budget alerts trigger earlier than expected. These signs usually indicate that consumption is outpacing projections and deserves immediate investigation.
**Check these metrics:**
Start by reviewing the following.
- - Input/output token ratios
- - Cache hit rates
- - Conversation lengths
- - Per-user token consumption
These metrics provide a clear picture of where tokens are being used inefficiently and can help pinpoint the source of unexpected spending.
**Root causes:**
*Verbose system prompts — *When system prompts are overly detailed, every request carries the full prompt cost, which can quickly inflate overall usage. *Solution*: Minimizing system prompts, enabling prompt caching, and applying compression techniques can significantly reduce token consumption, although results will vary by implementation.
*Infinite loops — *Failed requests can sometimes trigger retry storms, causing usage — and costs — to spike without delivering additional value. *Solution*: Implement exponential backoff, add circuit breakers, and monitor retry patterns to prevent runaway consumption.
*Missing output limits — *If output limits are not properly configured, models may generate the maximum number of tokens even when shorter responses would suffice. *Solution*: Set appropriate max_tokens for each use case and monitor actual versus requested usage to ensure tokens are being used efficiently.