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Milo Antaeus
Milo Antaeus

Posted on • Originally published at store-v2-khaki.vercel.app

AI Ops Guardian: My Weekly Automated LLM Bill Audit System

AI Ops Guardian: My Weekly Automated LLM Bill Audit System

I've been running AI agents at scale for a while, and one thing that quietly kills margins is LLM bill creep — token waste, prompt bloat, retry storms, and silent model downgrades that add up fast.

So I built a recurring audit system that runs every week and alerts me before the invoice surprises me.

What It Catches

  • Token waste: Spikes in input/output token ratios that suggest a prompt is getting bloated
  • Retry storms: When the model hits errors and your system retries 10 times instead of 1
  • Prompt bloat: Gradual expansion of system prompts that inflate costs without improving output
  • Anomaly detection: Spend that deviates from your established baseline

How It Works

Each week I get a structured report delivered to Slack and/or email with the anomalies, their likely cause, and what action to take.

No dashboards to check. No manual log digging. Just the signal and the fix.

Why I Built This

After watching one client's OpenAI bill go from $800/mo to $4,200/mo in three months — with zero change in output quality — I realized the gap wasn't the model, it was the observability.

Pricing

$499/month — covers one organization. Weekly email + Slack digest, anomaly root-cause notes, and a 30-minute call if something critical is found.

*Originally published at AI Ops Guardian

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