I Got Tired of Surprise OpenAI Bills, So I Built a Dashboard to Track Them

A few months ago, I got a bill from OpenAI that was about 3x what I was expecting. No idea why. Was it the new summarization feature we shipped? A single power user going nuts? A cron job gone wild? I had no clue. The default OpenAI dashboard just gives you a total, which is not super helpful for finding the source of a spike. This was the final straw. I was tired of flying blind. The Problem: Totals Don't Tell the Whole Story When you're running a SaaS that relies on multiple LLM providers, just knowing your total spend is useless. You need to know: Which provider is costing the most? Is gpt-4o suddenly more expensive than claude-3-sonnet for the same task? Which feature or user is responsible for that sudden spike? I looked for a tool that could give me this visibility without forcing me to proxy all my API calls through their servers. I didn't want to introduce another point of failure or add latency. I just wanted to see my costs. Nothing quite fit what I needed, so I did what any