anthropic
// stealth
Space Bunny Alpha
stealth/space-bunny-alpha
Space Bunny Alpha is free to call with a 1M-token context window.
A reasoning, tool-calling model from stealth, released Sep 23, 2026. LiveBench hasn't published a run for it, so this page carries measured price and specs only — no benchmark numbers.
- Input / 1M
- Free
- Output / 1M
- Free
- Context
- 1M
- LiveBench overall
- Not evaluated
Specs and pricing
| Input price USD per 1M prompt tokens | Free |
|---|---|
| Output price USD per 1M completion tokens, reasoning included | Free |
| Blended price 3:1 input:output — #1 cheapest of 347 listed models | Free |
| Cached input read Blank means not priced separately — not free | — |
| Cache write | — |
| Context window | 1,000,000 tokens |
| Max output | 524,288 tokens |
| Input modalities | text, image, video |
| Tool calling | Yes |
| Extended reasoning | Yes |
| Knowledge cutoff | — |
| Listed | Sep 23, 2026 |
What Space Bunny Alpha costs to run
Monthly list cost across five workload shapes, using the published cached-input rate where there is one. A floor, not a quote — batch discounts and cache writes aren't included.
| Workload | Per month |
|---|---|
| Support chatbot 1.2K in / 400 out × 200K requests | $0/mo |
| RAG assistant 8K in / 600 out × 100K requests | $0/mo |
| Coding agent 40K in / 4K out × 20K requests | $0/mo |
| Document extraction 20K in / 1.5K out × 50K requests | $0/mo |
| Bulk classification 500 in / 20 out × 5M requests | $0/mo |
Compare Space Bunny Alpha with
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Space Bunny Alpha FAQ
How much does Space Bunny Alpha cost?
Space Bunny Alpha is listed as free on OpenRouter, typically with tighter rate limits than paid models.
What is the context window of Space Bunny Alpha?
Space Bunny Alpha accepts up to 1,000,000 tokens of context and can return up to 524,288 output tokens per response.
Does Space Bunny Alpha support tool calling?
Yes — Space Bunny Alpha supports tool (function) calling and exposes extended reasoning. It accepts text, image, video input.
How does Space Bunny Alpha score on benchmarks?
LiveBench has not published a run for Space Bunny Alpha yet. Until it does, compare it on price and specs, or run your own evaluation on your own tasks.
What is the API model ID for Space Bunny Alpha?
On OpenRouter the model ID is "stealth/space-bunny-alpha". It was listed on Sep 23, 2026.
How these numbers are produced
- Price and specs — provider list data from OpenRouter, refreshed every 15 minutes. “Blended” is a 3:1 input:output mix.
- Scores and ranks — LiveBench release 2026-06-25. Ranks count only models that have a published run; a blank means “not evaluated”, never “bad”.
- Cost per point — the measured dollars LiveBench spent on the run, divided by the score it earned.
Published benchmarks rank models on someone else's tasks. Before committing, see LLM & agent evaluation for building an eval on your own.