MiniMax M1 80k
MiniMax · 2025-06-16 · 456.1B parameters
MiniMax M1 80K is the final long-thinking checkpoint in MiniMax’s two-version M1 release, an open-weight hybrid Lightning/softmax-attention MoE reasoning model built from MiniMax-Text-01. MiniMax reports 456 billion total and 45.9 billion activated parameters, and trained this checkpoint by extending the 40K model through staged RL output-length limits of 48K, 56K, 64K, 72K, and 80K using CISPO; the released safetensors contain exactly 456,089,655,296 parameters.