MiniMax open-sources M3.1 Flash, a 428B-parameter agentic MoE with 1M context
MiniMax
MiniMax published weights for MiniMax-M3.1-Flash on Hugging Face on October 23, 2026, four days after the hosted launch. The model is a 428B-parameter mixture of experts with roughly 23B active per token, a 1M-token context, and text, image and video input, under the MiniMax Community License, which requires written permission for commercial use by companies above $20M in annual revenue. Reported scores include DeepSWE v1.1 73.7% and OSWorld 2.0 61.7%, at $0.15/$0.60 per million input/output tokens.
Why it matters
A frontier-scale Chinese open-weights drop lands within days of DeepSeek's MIT-licensed V4.1 Flash, and its revenue-gated licence splits the Chinese open-weights camp into permissive and conditional tiers.
Importance: 4/5
frontier-scale open-weights release with multiple independent confirmations