# Free Space Bunny Model playground, no signup > Source: > Published: 2026-09-27 22:05:14+00:00 A stealth model gaining traction across coding agents — a 1,000,000-token context window, multimodal input, and strong coding performance, served fast. Try it free in your browser, or drop it into your app via our API. A stealth preview model with frontier-scale context, served fast — and free while it lasts. Drop a whole repo, a long transcript, or a book into a single call. 1M tokens in, up to 524k out — no chunking gymnastics. Space Bunny Alpha is free right now. Try it in the browser with zero signup, or point your code at our hosted endpoint. Adjustable reasoning effort, native text-vision-audio-video input, strong coding, and blazing-fast inference. Most models cap out long before a real codebase or document fits. Space Bunny Alpha takes 1,000,000 tokens in a single call — and returns up to 524,288. Free in the browser, a drop-in hosted API, straight from OpenRouter, or as a 1M-context tool inside your agent — your call. The fastest way to code with Space Bunny for free. Point opencode at our OpenAI-compatible endpoint and go. opencode setup → One OpenAI-compatible key, no OpenRouter account, no rate-limit surprises. Drop it into any SDK, CLI or agent. Get an API key → Prefer the source? Call stealth/space-bunny-alpha directly. We show you exactly how, plus the caveats. How to call it → Give Claude Code, Cursor or opencode a 1M-context tool via MCP — offload whole-repo analysis to Space Bunny. Install the tool → Space Bunny Alpha is an anonymous ('stealth') large language model available on OpenRouter since September 2026. It has a 1M-token context window, native multimodal input, adjustable reasoning, and strong coding — served fast and, during the preview, for free. The provider is anonymous during the preview. Community reverse-engineering of its tokenizer and behavior points to MiniMax M3, but the identity is unconfirmed. OpenRouter only routes requests to it. Yes — it's free during the OpenRouter preview. Our browser playground is free with no signup. Our hosted API has a free tier plus paid plans for higher limits and reliability when the model graduates to paid. Point opencode's OpenAI-compatible provider at our endpoint (or OpenRouter) and select space-bunny-alpha. Full step-by-step on our opencode integration page. 1,000,000 input tokens and up to 524,288 output tokens — one of the largest available, ideal for whole-codebase and long-document tasks. Free, no signup, streamed from the real API. Then grab a key to use it anywhere.