Overview
Space Bunny Alpha is an anonymous large model with blazing-fast inference, strong coding capabilities and native multimodal input support. It delivers adjustable reasoning effort, and a 1M-token context window. Space...
Our take
Among the numerous AI chatbots available, Space Bunny Alpha distinguishes itself through its substantial 1,000,000-token context window and multimodal input capabilities. This makes it particularly suited for tasks requiring extensive contextual understanding, such as analysing large research papers or lengthy codebases, where its vision capabilities allow for the inclusion of diagrams or screenshots. Unlike alternatives such as Claude or ChatGPT, which are often associated with specific providers, Space Bunny Alpha is presented as an anonymous large model, accessible for free via the OpenRouter API. Its built-in reasoning mode aims to assist with complex problem-solving. This tool is ideal for users engaged in research or writing who require a large context window and the ability to process image inputs without incurring direct costs. However, potential users should be aware that its availability and rate limits are dependent on the upstream provider.
How Space Bunny Alpha stacks up
Among the 373 chatbots & llms tools in our directory, it ranks #3 of 368 on quality (9.2/10), 15% above the 368-tool average of 8.0, and it's one of the free-to-use options in the category.
Space Bunny Alpha in depth
Space Bunny Alpha, built by Stealth, sits in the chatbots & llms space and is completely free to use. Our editors rate it 9.2 out of 10 based on capability, ecosystem and value. It handles a context window of 1,000,000 tokens.
On the feature side, Space Bunny Alpha brings 1,000,000-token context window, vision (image input), reasoning / chain-of-thought and tool / function calling. These are the capabilities that most shape day-to-day use and separate it from thinner alternatives.
Its biggest strength is completely free to use via the openrouter api, while the main trade-off to weigh is that availability and rate limits depend on the upstream provider. Keep both in mind when deciding whether it fits your workflow.
Space Bunny Alpha is most often chosen for research and writing. If that matches your goals, it's a strong candidate to shortlist.
Key features
- ✓1,000,000-token context window
- ✓Vision (image input)
- ✓Reasoning / chain-of-thought
- ✓Tool / function calling
Pricing
Pros
- +Completely free to use via the OpenRouter API
- +Large 1,000,000-token context window, bigger than most models listed here
- +Built-in reasoning (chain-of-thought) mode for harder problems
- +Accepts images as input (vision-capable)
Cons
- −Availability and rate limits depend on the upstream provider
Who should use Space Bunny Alpha
- →Anyone looking for a chatbots & llms tool from Stealth.
- →Teams and individuals focused on research and writing.
- →Users who want to try before they buy — there's a free tier.
- →People who value completely free to use via the openrouter api.
Who should look elsewhere
- →Those for whom availability and rate limits depend on the upstream provider is a dealbreaker.
Best for
10 Best Space Bunny Alpha Alternatives in 2026
Space Bunny Alpha is a strong chatbots & llms tool, but it is not the only option. Whether you are after a lower price, different features or a better fit for your workflow, here are the 10 best alternatives to Space Bunny Alpha, ranked and compared.
Anthropic
Claude is Anthropic's family of AI assistants, known for long-context reasoning, careful writing and strong coding…
OpenAI
ChatGPT is OpenAI's flagship conversational AI, powering hundreds of millions of weekly users across web, mobile and…
Google DeepMind
Gemini is Google's natively multimodal model family, deeply integrated across Search, Workspace, Android and the Pixel…
Qwen
Qwen3.8 Max Prime is a higher-throughput variant of Qwen3.8 Max from Alibaba's Qwen team, served as a separate SKU at a…
OpenAI
GPT-6 Luna Pro is the same underlying model as [GPT-6 Luna](https://openrouter.ai/openai/gpt-6-luna), served with…
OpenAI
GPT-6 Luna is the fast, cost-efficient model in OpenAI's GPT-6 series, positioned below GPT-6 Sol.
OpenAI
GPT-6 Sol Pro is the same underlying model as [GPT-6 Sol](https://openrouter.ai/openai/gpt-6-sol), served with…
OpenAI
GPT-6 Sol is the cost-efficient high-end model in OpenAI's GPT-6 series, positioned below the flagship GPT-6 Astra and…
Anthropic
Claude Opus 5.5 is Anthropic's flagship model for demanding reasoning, coding, and long-horizon agentic work…
Xiaomi
MiMo-V2.6-Pro-UltraSpeed is the fast speed edition of Xiaomi's flagship foundation model, MiMo-V2.6-Pro.
Space Bunny Alpha vs top alternatives
A side-by-side look at how Space Bunny Alpha stacks up against its closest rivals.
| Feature | Space Bunny AlphaStealth | ClaudeAnthropic | ChatGPTOpenAI | GeminiGoogle DeepMind |
|---|---|---|---|---|
| Quality score | 9.2 / 10 | 9.6 / 10 | 9.5 / 10 | 9.2 / 10 |
| Starting price | Free | $20/mo | $20/mo | $20/mo |
| Free tier | Yes — Free tier available | Yes — Free tier available | Yes — Free tier available | Yes — Free tier available |
| API input price | $0 / 1M tokens | $4 / 1M tokens | $0.1 / 1M tokens | $0.75 / 1M tokens |
| API output price | $0 / 1M tokens | $20 / 1M tokens | $0.5 / 1M tokens | $3.75 / 1M tokens |
| Speed | — | Fast | Fast | Fast |
| Context window | 1,000,000 tokens | 200K tokens | 128K tokens | 1M-2M tokens |
| Categories | Chatbots & LLMs | Chatbots & LLMs, Coding, Writing | Chatbots & LLMs, Coding, Writing | Chatbots & LLMs, Coding, Writing |
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Frequently asked questions
Q. Is Space Bunny Alpha free?
Yes — Space Bunny Alpha offers a free tier. Paid plans start at Free.
Q. How much does Space Bunny Alpha cost?
Space Bunny Alpha starts at Free. API usage is around $0 per 1M input tokens and $0 per 1M output tokens.
Q. What is Space Bunny Alpha best for?
Space Bunny Alpha is best suited to research and writing, within the chatbots & llms category.
Q. What are the best Space Bunny Alpha alternatives?
Popular alternatives to Space Bunny Alpha include Claude, ChatGPT, Gemini and Qwen: Qwen3.8 Max Prime. Each trades off price, quality and ecosystem differently.
Q. Is there a free alternative to Space Bunny Alpha?
Yes. Claude, ChatGPT, Gemini offer a free tier, making them good starting points if you want to avoid an upfront subscription.
Q. Why switch from Space Bunny Alpha?
Common reasons include pricing, specific feature gaps (Availability and rate limits depend on the upstream provider), data-privacy requirements, or simply wanting a tool that fits your stack better.
How we rate AI tools
Our quality score weighs capability on real tasks, breadth of features and integrations, pricing and value, and how actively the tool is maintained. Scores are editorial guidance, not benchmarks — always trial a tool on your own workflow before committing. Pricing and features change frequently, so verify current details on the official site.
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