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One markdown chat interface for multiple AI models, with prompt templates and cost previews, billed via your own API keys.
Quartzite is a chat client that sits in front of several AI models at once, adding a markdown prompt editor, version history, prompt templates, variables, and a cost preview before you send a request. Instead of charging for model usage itself, it charges a flat subscription for the interface and lets you bring your own API keys to pay each model provider directly. It's built by CMD Shift Studio and aimed at developers, researchers, and other frequent AI users who want one workspace instead of several subscriptions. The current plan is a discounted Early Supporter tier at $3.99 a month, down from a listed $7.99, with a lifetime price guarantee for early subscribers.
Early Supporter tier is $3.99/month (discounted from $7.99); model usage itself is billed separately via your own API keys.
Use tool ↗Quartzite is a bring-your-own-API-key chat client: you pay a small flat fee for the interface and prompt-management features, then pay each model provider separately for actual usage. That keeps the subscription cheap, but your total cost depends on API pricing you have to track yourself outside the app.
Watch out: The $3.99 Early Supporter price is explicitly framed as a limited, discounted tier — confirm the standing price before assuming it stays that low.
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