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MiniMax M3.1 Flash takes the agentic cost lead

The Die Brief Desk, after @MiniMax_AI

The lead on the agentic cost curve now belongs to MiniMax M3.1 Flash.

Picture posted by @MiniMax_AI
Picture posted by @MiniMax_AI
MiniMax M3.1 Flash
API price$0.15 / $0.60 per 1M input/output tokens
cache read$0.015 / 1M tokens
Automation-Bench62%
ALE30%
DeepSWE74%
BabyVision91%
vs M31/3 the cost of M3 and 3x the speed
weights dateOct 23

The model is listed at $0.15 per 1M input tokens and $0.60 per 1M output tokens, with cache reads at $0.015 per 1M tokens. Weights are set for Oct 23.

Picture from huggingface.co
Picture from huggingface.co

The model carries 428 billion total parameters and 23 billion active parameters.

Picture posted by @testingcatalog
Picture posted by @testingcatalog

The benchmark lead is the change. MiniMax M3.1 Flash leads on Automation Bench, Banker ToolBench, and LOCA-Bench-256K, while DeepSeek-V4.1-Flash-1017 stays ahead on the DeepSWE cost curve.

Picture posted by @Chinazhidx
Picture posted by @Chinazhidx

The per-token compute reduction is claimed at one-twentieth of the previous version. Distillation does not explain the disparity. Independent verification of the benchmark scores and the training compute is still missing.

The cost lead is the change; the missing baseline is the open question.

After @MiniMax_AI. We did not report this. The pictures, if any, are theirs.

October 19, 2026 · 1 min
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