Most teams waste 30–50% of their AI bill · 4 scans this week

Your AI bill is bigger than it should be.

KostAI quietly watches your AI tools for a week, spots exactly where the money is leaking, and points at the single fix that saves the most. Ten-minute setup. Runs on your machine. Nothing goes to us.

Buy install — $100 See it first

$100 one-time. No subscription. Refund if it doesn't save you $50/month. See a sample report · FAQ →

The install
$100one-time

Ten-minute setup on a video call. Yours forever.

Buy install — $100
Refund promise: if the 7-day report doesn't find at least $50/month of waste, we refund the install. We keep receipts.

Want to peek before you buy?

Paste this little message into Claude, ChatGPT, or any AI assistant you already use. Your assistant will run the KostAI check on your project and explain what it found in plain English.

Copy · paste · chat
Please install the kostai npm package in my current project, wrap my most-used AI call with it, run it once, and then explain the KostAI report in plain English — especially what's wasting money and how much, per month, at this rate.

Works in any AI assistant that can run commands on your project. Nothing leaves your machine.

Nine ways your AI is leaking money.

These are the patterns KostAI watches for. Each one is a specific, named thing — not a vibe. Most setups have three or four of these running quietly in the background.

📚
Sending a whole book when a paragraph would do
Stuffing 50 pages of context into a call that only needed the last answer. You pay for every page.
🧠
Using the expensive brain for easy work
Routing a "summarize this email" task to GPT-4 when a much cheaper model would have nailed it.
🔁
Asking the same thing twice in a minute
Two calls, same prompt, thirty seconds apart. A simple cache turns this into zero.
🗄️
Paying for an answer you already have
Your cache exists but it's stale or misconfigured, so you're hitting the API for results you've already paid for.
🔇
Silent retries burning tokens
Your error handler quietly re-runs the same call three times. You pay for all three, only keep one.
📝
A system prompt that never gets trimmed
Two thousand tokens of old examples the model doesn't need anymore. Paid on every single call, forever.
📖
Asking for a summary, getting a novel
The model over-answers. Capping the response length saves half the output cost on these calls.
🎯
Using frontier AI for trivial stuff
The call was a coin flip or a simple classification. A free local model on your Mac would have handled it.
👀
Paying for output nobody reads
The client cut off the stream but you still paid for the full response. Streaming with early-stop saves these.
What people typically save after one install.

Small teams (1–3 people using AI tools daily): $40–$200 / month.
Mid-sized product teams: $300–$1,500 / month.

The biggest leak is almost always #1 or #6 — and the fix is usually a five-line change, not a rewrite.

How the install goes.

Same day. No drama.

Step 1
You send one email
Tell us roughly what AI tools you're using — a sentence or two is plenty.
Step 2
We set it up on a call
Ten-minute video call. We install KostAI on your machine while you watch. You see the first measurement right away.
Step 3
Report in your inbox on day 7
One-page plain-English note. The biggest leak, the dollar number, and the single fix that saves the most.

Part of a little family.

KostAI measures where your AI is wasting money. Its sibling, BrainOfBrains, adds a gentle watcher that keeps an eye on the health of your whole setup. Buy either. Buy both. Same friendly install, same refund promise.

Meet BrainOfBrains →

Ready for a smaller AI bill?

$100 one-time. Refund if it doesn't save you $50/month. Ten minutes to install. Yours to keep.

Buy install — $100