Author built a playable 3D game with Space Bunny (anonymized M3.1 Flash), flags 62.2 vs Opus 5's 50.3 on Automation-Bench
The author previously built a playable 3D game with the anonymized Space Bunny and enjoyed it; he relays official claims of 3x M3's speed at one-third the cost and highlights Automation-Bench at 62.2 versus Claude Opus 5's 50.3.
MiniMax just introduced M3.1 Flash, and the numbers are pretty impressive. According to MiniMax, it's 3x faster than M3 at just one-third of the cost, with strong results across coding, agentic tasks, and visual reasoning. One benchmark really caught my attention: M3.1 Flash scores 62.2 on Automation-Bench, compared to 50.3 for Claude Opus 5. That's particularly interesting for developers building AI agents that handle multi-step workflows, use tools, and automate repetitive coding tasks. Having a fast, affordable model perform this well could make a real difference in everyday development. I previously used Space Bunny, which was powered by an earlier version of this model, to build a playable 3D game. I genuinely enjoyed that experience, so I'm excited to see what this new version can do in practice!
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