MiniMax launched M3.1 Flash, a 428-billion-parameter mixture-of-experts model priced at $0.15 per million input tokens, with open weights due October 231,2. The company said the model delivers "a generational leap" in agentic tasks, coding, computer use, and cybersecurity.
MiniMax Group Inc confirmed on October 19 that the anonymous model Space Bunny, which topped daily token-call-volume rankings on OpenRouter and Opencode within three days of its late-September launch, is an early version of M3.1 Flash6. The company's official account posted a video captioned "Welcome back, Space Bunny" to reveal the connection.
MiniMax said M3.1 Flash nearly triples online inference speed and cuts usage costs by 70%. Space Bunny processed more than 200 trillion tokens while operating anonymously. During that period, it joined DeepSeek-V4.1-Flash and GLM-5.3-Flash in the top three on the same volume rankings. A Pro version of M3.1 Flash is also set to launch soon, according to MiniMax.
Deep Seek released an update to its own DeepSeek-V4.1-Flash model on October 17, reducing task execution time[2]. ANALYSIS M3.1 Flash's $0.15-per-million-input pricing and claimed 70% cost reduction place it in direct competition with the latest Flash-tier models from Deep Seek and the GLM family for high-volume agentic workloads.