MiMo v2.6 details: grounded environment synthesis and multi-harness training for open source users
tokenbender · x · 2026-09-22
Parts 4-5: MiMo's environment synthesis follows solid data-synthesis principles—clean specs, sampling from a rich pool of real-world scenarios, curating good seed tasks and grounding in them. It draws on CodeMidas for source-code-driven synthesis, with long-horizon tasks largely via agent-driven synthesis. Section 4.2.5 shows training across multiple harnesses matters since open source users build their own harnesses rather than converging on one.
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