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MiniMax launches M3.1 Flash, reveals "Space Bunny" stealth model identity
Chinese AI company MiniMax on Monday launched its next-generation lightweight model M3.1 Flash and confirmed that the mysterious "Space Bunny" model that ran anonymously on OpenRouter was an early version of it. The company says the new model brings a generational leap in agentic tasks, coding, computer use and cybersecurity, with nearly 3x online inference speed and 70% lower cost; model weights are expected on October 23.
Why it matters
This is MiniMax's first flagship-level release via a "stealth test, then public reveal" playbook — while anonymous, "Space Bunny" processed 56.7 trillion tokens on OpenRouter and topped the leaderboard for 10 straight days, so the market effectively stress-tested it in the real world before launch.
Full report
MiniMax officially launched M3.1 Flash on October 19, and confirmed in its official blog and via its official X account that the mysterious model that ran anonymously on OpenRouter under the name "Space Bunny" was an early version of M3.1 Flash.
The company says the new model delivers a "generational" improvement in agentic tasks, code generation, computer use and cybersecurity, with nearly 3x online inference speed and 70% lower cost. It supports a 1-million-token context window, priced at $0.15 per million input tokens and $0.60 per million output tokens; the model weights are expected to be released on October 23.
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