Assistant · Vendor site 2026-10-04
Quartzite is an advanced AI chat interface for complex tasks such as research, learning, strategic thinking, and creative writing. It unifies many models in one app, adds a Markdown prompt editor, version history, cost preview, template libraries, prompt optimization, variables, CSV import, and export options.
Power users who want one interface for many LLMs with serious prompt tooling instead of a single ChatGPT or Claude subscription.
Model usage costs are not included in the Quartzite subscription—you pay providers separately via your own API keys.
Quartzite markets itself as the AI chat interface for complex tasks—research, learning, strategic thinking, and creative writing—with advanced prompting tools on top of many models.
What it can do
Unknown is different from unavailable. Each fact carries its own evidence.
| Capability | Value | Evidence | Checked |
|---|---|---|---|
| Multi-model chat | Quartzite lists Opus, Gemini, GPT-5, o3, OpenRouter, DeepSeek, Perplexity, Llama, Mistral, and more in one app. | Facts sourced | 2026-10-04 |
| Prompt editor | Advanced prompts can be drafted in a Markdown editor with drafts, version history, and cost preview. | Facts sourced | 2026-10-04 |
| Templates | Users can build template repositories, fill variables, import CSV data, and export outputs. | Facts sourced | 2026-10-04 |
Understand the total cost
Early Supporter Plan
$3.99 /mo
Advertised as $3.99 per month with secure payment via Lemon Squeezy; lifetime rate lock for early supporters.
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Explore toolThe practical questions
Quartzite provides a unified interface, but model usage is billed through your own provider API keys rather than being included in the Quartzite subscription.
Yes—the site states Quartzite currently works by bringing your own API key, with free support available to help set up accounts.
Quartzite is an advanced AI chat interface for complex tasks such as research, learning, strategic thinking, and creative writing. It unifies many models in one app, adds a Markdown prompt editor, version history, cost preview, template libraries, prompt optimization, variables, CSV import, and export options.
The homepage links to a free version of Quartzite; paid Early Supporter access unlocks all features with a lifetime price lock.. This record lists ongoing free access; check the plan limits before starting.
The listed monthly price is $3.99 USD at monthly billing. See the plan cards for entitlements, billing commitments and seat minimums.
Users bring their own API keys to access listed models; the site says direct credit purchases via Quartzite are not available yet.. API access and subscription access may have different terms; consult the linked sources.
Model usage costs are not included in the Quartzite subscription—you pay providers separately via your own API keys.
No retained pricing changes yet. A current price alone does not establish a historical trend.
Reviewed vendor source
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