Exploring LLM costs

PostHog attaches per-call cost metadata to every $ai_generation and $ai_embedding event at ingestion time. Every cost question reduces to an aggregation over those two event types — the interesting variation is only in how you group, filter, and compare.

This skill covers the common cost investigations: total spend, breakdowns (model, provider, user, trace, custom property), token and cache-hit analysis, regression debugging, and materializing results as insights, dashboards, or alerts.

Tools