LLM monthly cost exceeds 90% of budget

Without automated cost tracking, LLM token usage can exceed budget thresholds. When monthly costs reach 90% of the allocated budget, alerts should trigger. GPT-4o costs $2.50/1M input tokens and $10.00/1M output tokens. At 100 requests per second with thousands of tokens per call, monthly costs can reach tens of thousands of dollars.

Implement automated cost tracking using token usage from traces. Calculate costs using per-model pricing (gpt-4o: $2.50 input, $10.00 output per 1M tokens). Set up alerting when monthly_cost / monthly_budget exceeds 90%. Track cost breakdown by model and endpoint to identify optimization opportunities.