Quartzite

Quartzite is a unified AI chat interface and prompt engineering platform designed for creators, developers, and advanced users who need to work with multiple language models in one place. It provides seamless access to top models like GPT-5, Claude, Gemini, Llama 3, Perplexity, Mistral, and more, along with advanced tools for crafting, optimizing, managing, and exporting prompts. Features include a Markdown-based prompt editor, version history, token and cost previews, a reusable template repository, data import/export, and an automatic prompt optimizer.