Free AI cost calculator:
check before the merge
Free AI prompt cost calculator — no login, no signup. Paste a prompt, pick a model, compare providers side by side with live, cache-aware rates.
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Notify me when live →What is Stowly?
Stowly is a free AI prompt cost calculator: paste your prompt, pick a model, and see the real spend — cache-aware, verified rates, request volumes included. No signup, no dashboards, just the cost of your prompt.
What it can do
Join the waitlist
Get each tool first: compare, CLI plugin, budget planner.
Questions
What is stowly?
One honest tool at a time: a free AI prompt cost calculator first, then compare, a CLI plugin, and a budget planner.
Is it really free?
Yes, no signup, no account. The waitlist only asks for an email when you want each next tool first.
What counts as a token?
Roughly 4 characters of English text per token. Pasted prompts are estimated automatically; outputs and request volume are yours to set.
Who is stowly for?
Developers and small teams shipping AI features who want to know their spend before the bill arrives — no dashboards required.
What ships next?
Compare providers and models, then the CLI plugin, then the budget planner. Join the list above to get each one first.
Can I use it for production cost planning?
Not yet — the budget planner is next. Today you can estimate per-prompt spend and scale it by request volume to get a ballpark.