What is Space Bunny
Space Bunny (Space Rabbit) is anonymously launchedOpenRouterandOpenCodelarge model. Space Bunny focuses on fast inference,programmingcapabilities and native multimodality, with a 1 million Token context window, supporting text, image, and video input. Just 3 days after launch, it topped the daily call volume charts on two major platforms.
Main Features of Space Bunny
- High-Speed Inference: Focuses on extremely fast response speed, evaluated by developers as "approximately equivalent to GLM 5.3 Flash but faster".
- Programming Capability: Can quickly generate complete websites, game prototypes, and visual works; tested to generate a portfolio website in a few minutes.
- Native Multimodal Input: Supports three input forms: text, image, and video; output is text.
- Ultra-Long Context Window: Context reaches 1 million Tokens, maximum single output 524,288 Tokens.
- Adjustable Reasoning Intensity: Provides low / high / max reasoning levels, allowing trade-offs between speed and effect.
- Tool Calling and Structured Output: Supports Function Calling, Tool Choice, and JSON Schema structured output, suitable for Agent scenarios.
Technical Principles of Space Bunny
Core architecture information such as parameter count, whether it is MoE, and attention mechanism of Space Bunny is completely undisclosed.
Speculation on Space Bunny's Identity
The most mainstream and well-evidenced speculation is MiniMax M3.1 (Flash version), but MiniMax has not officially claimed it. Notably, MiniMax has officially announced the launch of M3.1-Flash-Preview MiniMax Code, which highly overlaps with Space Bunny's configuration.
How to Use Space Bunny
- Register an OpenRouter Account: Open the OpenRouter official website and log in with email or Google account.
- Find the Model: Search in the model list for
stealth/space-bunny-alpha, and enter the model details page. - Create an API Key: Generate a dedicated API Key in account settings (Keys page) for calling the interface.
- Choose a Calling Method: You can directly try it for free in the OpenRouter web Chat window without writing code.
- Or Integrate with API Development: Configure OpenRouter's interface address and your API Key in code, set the model name to
stealth/space-bunny-alphato initiate requests. - Adjust Parameters for Use: Set low / high / max reasoning levels, tool calling, or multimodal input as needed.
Usage Examples of Space Bunny
Example 1：
Example 2：
Core Advantages of Space Bunny
- Ultra-Fast Inference: Evaluated by developers as "approximately equivalent to GLM 5.3 Flash but faster", can generate complete websites in a few minutes, with response speed leading among models in the same tier.
- High Token Efficiency in Testing: Lower Token consumption while maintaining speed, allowing low-cost completion of many tasks during the free trial period.
- Outstanding Programming and Front-End Capabilities: High completion in generating websites, game prototypes, and visual works.
- Native Multimodal Input: Supports three input forms: text, images, and video, and can handle multimodal content such as pictures, screenshots, and video frames.
- Million-level ultra-long context: A 1-million-token context window, capable of processing an entire book, a large codebase, or long video content in one pass.
- Adjustable reasoning intensity: Provides low / high / max reasoning levels, favoring speed for simple tasks and accuracy for complex tasks, flexibly balancing cost and quality.
- Tool calling and Agent compatibility: Supports Function Calling, Tool Choice, and JSON Schema structured output, suitable for integration into development tools and automation workflows.
Comparison of Space Bunny with similar competing products
| Dimension | Space Bunny | GLM-5.3-Flash |
|---|---|---|
| Architecture | Speculated MoE, about 428B total parameters / 23B activated) | MoE, 320B total parameters / 18B activated, sparse + linear hybrid attention |
| Context window | 1 million tokens, maximum output 524K | 1 million tokens, maximum output 128K |
| Input modalities | Text, images, video | Text, images, video |
| Reasoning levels | low / high / max adjustable | low / high / max adjustable (cannot be turned off) |
| Measured speed | Community review: “roughly equivalent to GLM 5.3 Flash but faster” | Output about 90 tok/s, TTFT about 0.2s |
| Coding performance | Community testing completion: “slightly better than GLM-5.3 Flash” | Coding Index 71.5%, AA Intelligence Index 57 (on par with Claude Opus 4.8) |
Space Bunny application scenarios
- Rapid programming development: Generate a complete website within minutes, reproduce a Minecraft-style prototype in 15 minutes, suitable for front-end development and rapid prototype validation.
- Creative visualization works: Generate a 1,564-line GPU fluid simulation demo in a single file, producing highly complete interactive visualizations without handwritten code.
- Long document and large codebase analysis: The 1-million-token context can read in an entire book or large project at once, and with multimodal input it understands screenshots and design drafts.
- Agent automation workflows: Can connect to toolchains to execute multi-step tasks, suitable for building automated workflows.
- Multimodal content understanding: Can be used for video content analysis, UI screenshot understanding, visual question answering, and other scenarios.