Reasoning you can read
Space Bunny Alpha always thinks before it answers. Space Bunny streams that reasoning in a collapsible panel, then the final answer.
Space Bunny Alpha · stealth model chat
Space Bunny: chat with Space Bunny Alpha
Space Bunny Alpha is the anonymous stealth model with a 1M-token context, strong coding and reasoning you can see. Space Bunny gives it a clean chat in your browser: pick how hard it thinks, watch the reasoning stream, keep every conversation.
- 1MToken context window
- 3Reasoning depths
- 20 freeWelcome replies
Space Bunny AlphaWhat can Space Bunny Alpha do for you?
Code, math, plans and writing. Pick a reasoning depth, then send.
THE MODEL
What is Space Bunny Alpha?
Space Bunny Alpha is a stealth model on OpenRouter: a large model released under a code name so developers can test it before its maker is announced. It is described as fast, strong at coding, natively multimodal and able to reason at an adjustable effort level, with a 1M-token context window.
Reasoning is mandatory, so every Space Bunny Alpha answer starts with a thinking pass. On Space Bunny you choose Fast, Balanced or Deep to trade speed for depth. The web chat sends text; the Space Bunny Alpha API also accepts images.
Stealth models can change or be withdrawn without notice, and their providers may log prompts to improve the model. Do not share secrets or personal data in Space Bunny chats.
- Context window
- 1,000,000 tokens
- Max output
- 524,288 tokens
- Reasoning
- Always on · adjustable effort
- Input
- Text, image, video
- Output
- Text
- Tools & JSON
- Tool calls · structured output
Source: OpenRouter model listing, checked September 28, 2026.
WHY SPACE BUNNY
A focused chat for Space Bunny Alpha
Choose how hard it thinks
Fast for quick answers, Balanced by default, Deep for hard bugs and proofs. Every depth costs the same single credit.
Strong at code
Paste a function, an error or a spec. Replies render Markdown with fenced code blocks you can copy.
Conversations that stay
Chats are saved to your account. Reload or come back later and pick up the same thread.
HOW IT WORKS
From question to answer in four steps
- 1
Write a message
Ask a question, paste code or start from an example prompt.
- 2
Pick a reasoning depth
Fast, Balanced or Deep. Deep gives Space Bunny Alpha more room to think.
- 3
Watch it think and answer
Reasoning streams first, then the answer, formatted in Markdown.
- 4
Keep the thread going
Follow up in the same chat; earlier turns are sent as context.
FOR DEVELOPERS
Space Bunny Alpha API
Use Space Bunny Alpha in your own app through an OpenAI-compatible endpoint. Keep your SDK, change the base URL and model, and pay 1 credit per request from the same balance as your chat. Streaming, reasoning effort, tool calls, JSON output and image input are supported.
from openai import OpenAI
client = OpenAI(
base_url="https://spacebunny.pro/api/v1",
api_key="sk_spacebunny_…",
)
reply = client.chat.completions.create(
model="space-bunny-alpha",
reasoning_effort="medium",
messages=[{"role": "user", "content": "Hi!"}],
)AT A GLANCE
Space Bunny Alpha on Space Bunny
Space Bunny is built for trying Space Bunny Alpha on real work: code, math, plans and long documents, with the reasoning visible.
ModelSpace Bunny Alpha
An anonymous stealth model listed on OpenRouter. Its developer has not been announced.
Context1M tokens
Space Bunny sends your recent turns within a fixed per-message budget.
Price1 credit per reply
Reasoning depth does not change the price. Failed replies are refunded.
APIOpenAI-compatible
POST /api/v1/chat/completions with streaming, tools, JSON output and image input. 1 credit per request.
FAQ
Space Bunny questions
What is Space Bunny?
Space Bunny (spacebunny.pro) is an independent web chat where you can talk to Space Bunny Alpha in your browser, choose its reasoning depth and keep your conversations.
What is Space Bunny Alpha?
Space Bunny Alpha is an anonymous “stealth” large model listed on OpenRouter. It is described as fast, strong at coding, with adjustable reasoning effort and a 1M-token context window.
Who made Space Bunny Alpha?
The developer has not been announced. Stealth models are released under a code name for testing. Space Bunny is not affiliated with the model developer or with OpenRouter.
Is Space Bunny free?
New accounts get 20 welcome credits. Each reply uses 1 credit. See Pricing for available credit plans.
Does Space Bunny Alpha show its reasoning?
Yes. Reasoning is always on for this model. Space Bunny shows the reasoning text it streams in a collapsible “Thinking” panel above each answer.
Are my chats private?
Chats are stored in your account and you can delete them. Messages are sent to OpenRouter and the stealth model provider to generate replies; stealth providers may log prompts to improve the model, so do not share sensitive or confidential information.
Is there a Space Bunny Alpha API?
Yes. Create a key on the Space Bunny Alpha API page and call https://spacebunny.pro/api/v1/chat/completions with any OpenAI-compatible SDK, using the model space-bunny-alpha. Each request uses 1 credit from the same balance as the chat; failed requests are refunded.
Can I send images or video?
The API accepts images (https URLs or base64 data URLs). The web chat currently sends text only. Video input is not offered yet.
Try Space Bunny Alpha now
New accounts get 20 free replies. No card needed.
Open the chatSpace Bunny is an independent service and is not affiliated with OpenRouter or the developer of Space Bunny Alpha. Model replies can be wrong; check important facts and code.