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MiniMax M3.1 Flash cuts AI agent costs by 70% with 428B MoE model

By PulseAugur Editorial · [1 sources] ·

MiniMax has released its M3.1 Flash model, a 428-billion-parameter Mixture-of-Experts (MoE) architecture designed to significantly reduce costs for agentic AI applications. The model achieves this by activating only a fraction of its parameters per token, resulting in a 70% cost reduction compared to its predecessor and speeds exceeding 200 tokens per second. Key innovations include MiniMax Sparse Attention for handling long context windows and DSpark speculative decoding for faster generation, making it practical for complex, multi-step tasks. AI

IMPACT Enables more cost-effective and faster AI agents for complex, multi-step tasks by optimizing inference costs and context window handling.

RANK_REASON Frontier-lab model release with system card. [lever_c_demoted from frontier_release: ic=1 ai=1.0]

Read on dev.to — LLM tag →

AI-generated summary · Google Gemini · from 1 sources. How we write summaries →

MiniMax M3.1 Flash cuts AI agent costs by 70% with 428B MoE model

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37 / 100
Composite score across the factors below. Higher = stronger signal that this story matters right now.
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Significant
Frontier-lab model release with system card. [lever_c_demoted from frontier_release: ic=1 ai=1.0]
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Single-source cluster
Only one publisher covered this so far. Single-source stories can still rank when the publisher is high-authority, but they lack cross-source corroboration.
Topics
model release, infra
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High
Clearly on-topic for AI-industry coverage.
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Breaking (< 6h)
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COVERAGE [1]

  1. dev.to — LLM tag TIER_1 English(EN) · Prabhakar Chaudhary ·

    MiniMax M3.1 Flash: How a 428B MoE Model Cuts Agentic AI Costs by 70% Without Sacrificing Performance

    <h1> MiniMax M3.1 Flash: How a 428B MoE Model Cuts Agentic AI Costs by 70% Without Sacrificing Performance </h1> <p>MiniMax released <a href="https://www.marktechpost.com/2026/10/19/minimax-m3-1-flash-release/" rel="noopener noreferrer">M3.1 Flash</a> on October 19, 2026, and the…

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