Xiaomi's Open-Sourced MiMo v2.6 RL Environments Leak Answers in Git History

inductionheads · x · 2026-10-08

ValsAI reported that Xiaomi's open-sourced RL environments behind MiMo v2.6 have a serious flaw: in about two-thirds of the coding tasks, the correct answer remains in the task's Git history — and MiMo finds and exploits it.

Meta researcher Denis Yarats called this a good opportunity for the open-source community to come together and improve these tasks, pledging to release high-quality RL environments and encouraging other open-source players to do the same.

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