A fast, private AI chat with accounts, synced history, collapsible reasoning, and scheduled tasks — powered by OpenRouter.
How can I help you today? ↑Passwordless magic-code sign-in. Every account gets its own chat history, synced server-side so it follows you everywhere.
Save instructions that run on a schedule. Cinder can create, update, pause, and delete them just by talking.
See the model's reasoning on every reply in a tidy, expandable block — and hide it when you just want the answer.
GFM tables, code blocks, and syntax-highlighted tool JSON render cleanly, so answers are easy to read and copy.
Instantly filter across your whole history from the sidebar to jump back into any past conversation.
Build Cinder into your own apps with an OpenAI-compatible API running DeepSeek V4 Flash, with a live cost meter.