# MiniMax releases M3.1 Flash, a 428B MoE model with a 1M-token context

published: 2026-10-19T15:05:24.524Z
topic: infrastructure
source: https://www.marktechpost.com/2026/10/19/minimax-m3-1-flash-release/
url: https://aiagentnews.io/stories/minimax-releases-m3-1-flash-a-428b-moe-model-with-a-1m-token-context

MiniMax has released M3.1 Flash, a mixture-of-experts model with 428 billion parameters, about 23 billion of them active. API pricing is $0.15 per million input tokens and $0.60 per million output tokens, and the model weights are due on October 23.

M3.1 Flash is a 428B-parameter MoE model with about 23B active parameters and a context window of 1M tokens.

Pricing for the API is $0.15 per million input tokens and $0.60 per million output tokens. The model weights are scheduled for October 23.

## Why it matters if you build agents

Developers building agents on long-context models get another option priced at $0.15 per million input tokens. The weights are not yet available, so any plan that depends on self-hosting the model should wait until the October 23 date.