Space Bunny, From Stealth to Open Weights

23 Oct 2026 by Zhu Liang

How MiniMax's Space Bunny went from an anonymous OpenRouter model to M3.1 Flash with open weights, dated from MiniMax's and OpenRouter's pages.

Space Bunny, from stealth to open weights. Totals on OpenRouter: Space Bunny Alpha (stealth) 56.7T, Sep 23 to Oct 5; M3.1 Flash free 13.7T, Oct 19 to 22, the 3rd most-used model on OpenRouter Oct 16 to 22; M3.1 Flash paid 0.05T (52.6B). Stacked bars of tokens per day: violet stealth bars rise from 0.29T to 6.73T on Oct 4 and end at 4.20T on Oct 5; green M3.1 Flash bars Oct 19 to 22 (1.05T, 3.91T, 5.38T, 3.39T). A dashed orange line, DeepSeek V4.1 Flash per day for scale (the most-used model on OpenRouter Oct 16 to 22), runs from 2.8T to 3.9T under the stealth bars Sep 25 to Oct 4, peaks at 7.5T on Oct 7 and is near 2.9T by Oct 22. Numbered events over the chart join their dates: 1 Sep 23 listed anonymously on OpenRouter, 2 Oct 5 last day of stealth traffic, 3 Oct 19 launched as M3.1 Flash, free on OpenRouter, 4 Oct 22 free launch period ends, 5 Oct 23 weights on Hugging Face. Notes: tokens per UTC day, prompt plus completion, from OpenRouter's model pages. MiniMax's own count: Space Bunny processed more than 200 trillion tokens while operating anonymously. — Space Bunny, From Stealth to Open Weights
56.7T tokens in 13 days before it was revealed as M3.1 Flash
Space Bunny Alpha served more tokens on OpenRouter than DeepSeek V4.1 Flash every day from Sep 25 to Oct 4, 56.7T in all. As M3.1 Flash, free, it served 13.7T in four days, the third most-used model on OpenRouter Oct 16–22.
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