Quartzite AI
A Prompt IDE for creation of complex prompts for AI language models.
At a glance
Price not confirmed · Source review 2026-10-31- Price & billing
Early Supporter Plan at $3.99 per month (shown struck from $7.99) with a lifetime price guarantee; model usage is paid separately through your own API keys.
- Free allowance
Not separately confirmed. Check the current plan before relying on a free allowance.
- Best suited to
Power users and prompt engineers who want many models in one interface with prompt tooling.
Fit is editorial guidance, not a measured result.- Platforms
Access: not separately verified. Operating systems not separately verified.
Published-source facts and editorial guidance. No product test is implied. Confirm current conditions before purchase.
No product screenshot is claimed for this listing. Use the official website ↗ to inspect the current interface.
What to know before choosing
Good fit
Power users and prompt engineers who want many models in one interface with prompt tooling.
Limits and trade-offs
Requires your own API keys; model usage paid separately; credits sold by Quartzite are not available yet.
Plans and free allowances
Early Supporter Plan at $3.99 per month (shown struck from $7.99) with a lifetime price guarantee; model usage is paid separately through your own API keys.
Evidence
Quartzite homepage ↗ (reviewed 2026-10-31)
Official published page review; no authenticated product test
Dates: Last reviewed 2026-10-31. Last reviewed is the latest source or editorial review date; it is not a content-change date.
A closer look at Quartzite AI
Quartzite is an advanced chat interface for complex tasks: many models (Opus 4.5, Gemini 3, GPT-5.1, o3-pro, GPT-5, OpenRouter, DeepSeek, Perplexity, Llama 3, Mistral) in one app, with a Markdown prompt editor, version history, cost preview, template repository, prompt optimizer, variables and CSV data, and data export, using your own API keys.
Editorial guidance based on published documentation. The workflow below is a suggested starting point, not a measured product result.
When to choose Quartzite AI
- Power users juggling many models who want one interface with prompt versioning and cost preview.
- Prompt engineers who want a Markdown editor, template repository, variables, CSV data and a prompt optimizer.
- Users who prefer paying model usage directly over a flagship subscription.
When to choose something else
- Users who want an all-included subscription, since model usage is paid separately via your own keys.
- Beginners who do not want to obtain API keys, since keys are currently required.
- Buyers who need credits sold by Quartzite itself, since that is not available yet.
A practical starting workflow
- Add your own API keys for the models you use.
- Craft complex prompts in the Markdown editor and save them as templates.
- Preview token usage and cost before running.
- Run across models, iterate with version history, and export prompts and outputs.
Check before committing
- Model usage is paid separately through your own API keys; the platform price does not cover model costs.
- The $2-3 per month model usage figure is the vendor's own usage example, not a guarantee.
- Early Supporter pricing is a lifetime lock-in offer; terms beyond the price guarantee are not detailed in the reviewed text.
Common questions
What is Quartzite?
Quartzite is an advanced chat interface for complex tasks such as research, learning, strategic thinking and creative writing, putting many models in one app with prompt tools.
Which models are available?
Opus 4.5, Gemini 3, GPT-5.1, o3-pro, GPT-5, OpenRouter, DeepSeek, Perplexity AI, Llama 3 and Mistral are listed, with feature requests for more.
Do I need my own API key?
Yes, at the moment Quartzite works by bringing your own API key; buying credits directly is not available yet.
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Sources and checks
Last source review is not a date of product testing. No rating or test result is implied by inclusion. Check the current plan and terms before buying.