Find which workflow is eating your LLM bill

Goal: Cut LLM spend by measuring cost per workflow instead of per invoice.
Setup: agents used in source: n8n; tools/MCPs stated: n8n executions.
Steps:
1. Sum token usage from your own n8n executions per workflow and per model.
2. Find the workflow that dominates; check how often it actually runs.
3. Check what is actually published, not just saved (a saved but unpublished schedule kept the old version running).
4. Watch editor-assistant usage on the largest model; one day of it cost as much as a month of production.
Rules: ask me before anything irreversible (sending, posting, paying, deleting); don’t invent data, results or tools I haven’t given you; tell me what you couldn’t verify.
Note: The author found downgrading cheap workflows to a smaller model saved only about $1/month.
Based on: /u/Competitive-Joke-408 — https://www.reddit.com/r/n8n/comments/1wu5xjg/one_workflow_was_75_of_my_llm_bill_how_i_measured/

Steps are from the source. Includes a “Based on” credit line.