AI without another subscription

Most AI extensions charge monthly to resell model access. UtilEngine connects your own API key instead. You pay the provider for what you use, and nothing to us after the one-time purchase.

Get it for $49

What is BYOK?

BYOK abbreviation

In AI apps
You connect your own API key, from a model provider or a router like OpenRouter, instead of buying AI access through the app. The app sends your requests with that key, so every token you use is billed to your own account, not bundled into a monthly plan.
“UtilEngine is BYOK. You paste one OpenRouter key, and every AI request bills to your own account.”
In cloud security, the older use
A company generates its own encryption keys and imports them into a cloud provider's key service, instead of using keys the provider creates. It keeps control of the key material, including the power to revoke it.

How it works

Three steps, and every model is in the launcher.

Create a key

One free OpenRouter key reaches all 85 models.

Paste it once

Open AI Settings and paste the key. It stays in this browser and never syncs.

Pick your models

A different model for chat, Ask AI, and every command.

The math versus a subscription

AI extension subscriptions run $10 to $30 a month whether you use them or not. That pricing only works if most subscribers use less AI than they pay for. BYOK skips the middle layer. A quick grammar fix on a fast model costs a fraction of a cent. A long research chat on a frontier model costs more, since every turn sends the conversation so far, so it pays to keep frontier models for the work that needs them. Your OpenRouter dashboard shows every request.

No model lock-in either. You can move between 85 models from seven providers, per chat or per command, and new ones arrive in free updates. The full model list shows what is in there right now, with prices per million tokens. New to OpenRouter? We wrote a plain-English guide to how it works and what it costs, and another on its free models and their limits.

Bring your own keyClaude Sonnet 5.5

Summarize a long article$0.01

4,000 in, 300 out

Rewrite a paragraphunder a cent

400 in, 200 out

Ask ten questions about a page$0.04

5,500 in, 2,500 out

All three, once each$0.05

Monthly fee$0

UtilEngine markup$0

OpenRouter list price, 1 October 2026

AI extension subscriptionper month

Monthly plan$10 to $30

Used or notsame price

A year$120 to $360

Keys and costs, answered

Is an OpenRouter key free?

Creating the key is free. You add credits to your OpenRouter account and pay per request at the provider's listed price, plus OpenRouter's fee when you buy credits.

What does typical usage cost?

Light use of a fast model costs cents a month. Heavy use of a frontier model costs more. Either way, you see the exact spend in your OpenRouter dashboard.

Do I have to use OpenRouter?

Yes, UtilEngine connects through OpenRouter. Creating a key is free, and that one key reaches all 85 models from OpenAI, Anthropic, Google, and more, billed at the providers' listed prices.