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Space Bunny Alpha

stealth/space-bunny-alpha · Undisclosed (stealth)Family attributed by measurement
Likely family (measured)
MiniMax
Entered catalogue
23 September 2026
Last tested
23 September 2026
Family attribution confidence
High

Why high: an exact fingerprint shared with 8 models.

Evidence
  • ✓ exact tokenizer signature shared with 8 models
  • ○ awaiting the maker's or the platform's own word

Identity statement

Independent YFarmX measurements indicate that Space Bunny Alpha is consistent with the MiniMax family at high confidence. These measurements establish lineage evidence only: a shared tokenizer or serving contract shows shared ancestry, and does not independently establish the precise underlying release.

Verification note

Checked against the primary artefacts, 23 September 2026

Listed anonymously at 14:48 UTC on 23 September 2026 and measured the same day. Its token counts are MiniMax's on all 50 strings: every one of the eight MiniMax models in the dataset, from MiniMax-01 to M3, returns the same 50 counts, against 29 of 50 for the next closest family (Moonshot's Kimi K2) and a median of 11 across 287 measured models. Two passes agreed on every string and the fixed overhead held at 143 tokens before and after. MiniMax models share one vocabulary, so the counts place the family and cannot separate its versions. The listing has MiniMax M3's shape: a 1M-token context with text, image and video input, the only MiniMax model with that combination. Our read is a MiniMax model newer than M3. Asked who built it, the endpoint answers OpenAI and GPT-5, a claim the counts exclude: no OpenAI model uses this vocabulary. Raw measurements and the working are in docs/research/space-bunny-alpha/.

Space Bunny Alpha on OpenRouter (stealth listing, 23 September 2026)MiniMax M3 on OpenRouter

What we checked

Four different kinds of evidence, and what each one showed
We checkedWhat we foundWhere it came from
How it counts tokensCounts every one of the 50 test strings exactly like 8 other modelstk_9f84b5fb
How its API is set upA combination of settings no other listing in the catalogue usesapi_dd9fb93d
How much it can read and writeReads up to 1,000,000 tokens at once, writes up to 524,288its own listing
Whether it thinks before answeringAlways reasons, and cannot be turned off, at max, xhigh, high, medium, low, max by defaultits own listing
Who served our requestsStealthwe measured it, 23 September 2026

Shares this fingerprint

Exact signature first; template-boundary shifts of the same signature beneath

Closest measured models

Agreement across the mutually clean test strings

Click a row to open the full comparison.

The measured fingerprint

What each test string cost this model, in tokens

We sent Space Bunny Alpha fifty short pieces of text and recorded what each one cost it in tokens. The bars below are those costs. Two models built on the same tokenizer produce the same bars; a model built on a different one produces a different set, which is what makes this a fingerprint.

All 50 rows

English and whitespace

en-prose14
en-long16
spaces-203
spaces-603
tabs-204
newlines-204
mixed-ws6

Digits

digits-93
digits-124
digits-3010
digits-sep7
float-long9

CJK

zh-common10
zh-long11
zh-rare18
ja-kana7
ja-kanji9
ko11

Other scripts

ru14
ar9
he21
hi20
th25
el22

Emoji

emoji-basic10
emoji-skin12
emoji-zwj-family11
emoji-zwj-x333
emoji-flags16
emoji-prof18

Rare Unicode

math27
boxdraw25
combining6
cjk-ext-b16
surrogates41
zalgo34
rtl-mix9

Code

py-code25
py-indent15
json20
html16
regex45
camel6
snake6

Repetition and encodings

rare-word-x531
repeat-tok41
base6432
hex11
url17
uuid27

Overhead subtracted: 143 prompt tokens.

Declared record

What the catalogue claims about this model

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...

Modalities
text+image+video->text
Declared tokenizer
Other
Prompt price
$0 / M tokens
Completion price
$0 / M tokens

Supported parameters

include_reasoningmax_tokensreasoningreasoning_effortresponse_formattemperaturetool_choicetoolstop_p

defaults: {}

Catalogue entry

History

Every observation, kept as taken
  • 23 September 2026Enters the OpenRouter catalogue with no declared family.
  • 23 September 2026Fingerprinted in the YFarmX catalogue sweep · 50 of 50 strings measured clean.
  • 23 September 2026YFarmX assessment: consistent with the MiniMax family, high confidence.