MiniMax M3.1 Flash is the Flash-tier successor in MiniMax's M3 family, a multimodal reasoning model built for coding, autonomous agents, computer use, and long-horizon workflows at low cost. It is a 428B-parameter Mixture-of-Experts model with about 23B active parameters, accepts text, images, and video, and returns text, with a 1M-token context window and output up to about 524K tokens. Thinking is always on, with tunable depth. MiniMax reports about 70% lower overall cost than M3 on agentic tasks, with flat pricing and no long-context surcharge. It is currently API-only (MiniMax API, M Plan, and MiniMax Code), and MiniMax says weights will be released later.
minimax/minimax-m3.1-flashOct 19, 2026