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MiniMax releases M3.1 Flash, a faster and cheaper agentic model

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MiniMax says M3.1 Flash, previously known as the anonymous Space Bunny model, costs one-third as much as M3 and runs three times faster. It has a 1M context window, accepts text, image, and video input, and is priced at $0.15 and $0.60 per 1M input and output tokens. Model weights are scheduled for October 23.

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Sophia YangVerified on X
@sophiamyang

TL;DR:

- MiniMax M3.1 Flash is the anonymous "Space Bunny" model that was #1 on OpenCode for 12 days straight

- 1M context, with text, image and video input

- 1/3 the cost of M3 and 3x the speed

- $0.15 / $0.60 per 1M input/output tokens, cache reads $0.015

- Automation-Bench: 62.2%, ahead of Opus 5 (50.3%) and GPT-5.6 Sol (45.8%)

- DeepSWE: 73.7%, about tied with Opus 5 (74.0%) and behind DeepSeek V4.1 Flash (77.0%)

- ALE: 29.6% for about $111 total, close to Opus 5 (32.2%) and GPT-5.6 Sol (30.6%); Opus 5.5 scores higher (about 38%) but costs over $1,000

- BabyVision: 91.0%, just behind DeepSeek V4.1 Flash (92.5%)

- Open weights coming later, no date yet

MiniMax (official)@MiniMax_AI
MiniMax M3.1 Flash: Space Performance + Bunny Speed 🚀🐰 Yes, Space Bunny - which has topped global leaderboards with 200T+ tokens - was an earlier version of M3.1 Flash. 💰Redefining the performance economics of agentic AI. M3.1 Flash achieves frontier-level intelligence across key tasks such as Cowork (Automation-Bench: 62%; ALE: 30%), Coding (DeepSWE: 74%) and Visual Reasoning (BabyVision: 91%), at 1/3 the cost of M3 and 3x the speed. API pricing (flat rate): $0.15 / $0.60 per 1M input/output tokens, with cache reads at $0.015 / 1M tokens. Model weights will arrive on Oct 23. API: http://platform.minimax.io M Plan: https://www.minimax.io/m-plan MiniMax Code for desktop: https://agent.minimax.io/download
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Source: Sophia Yang · x.comPublished · added here

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MiniMaxOpen-source ecosystemDeployment & engineeringChina AIModel releasesEvals & benchmarks