Quartzite

Quartzite is a single workspace for chatting with multiple leading language models and refining advanced prompts in one place. It’s designed for people who run longer, multi-step sessions and want a clearer way to iterate on prompts across models.

Multi-model chat in one window

Quartzite lets you work with a wide range of models without jumping between separate sites, including:

• Opus 4.5
• Gemini 3
• GPT‑5.1
• o3‑pro
• OpenRouter
• DeepSeek
• Perplexity AI
• Llama 3
• Mistral
• Other supported models

Built for complex sessions and research

Conversations are organized as structured sessions, which helps when you need to:

• Compare answers across models
• Refine a question step by step
• Keep context for long research or learning workflows

Markdown prompt editor with version history

A core feature is the advanced prompt editor with Markdown support. You can:

• Build complex prompts from reusable blocks
• Save drafts and return to them later
• Track changes with version history to see how wording affects model outputs