Xiaomi's MiMo team just open-sourced MiMo Code — a terminal coding agent built on top of OpenCode, MIT licensed. The pitch isn't raw benchmark numbers. It's something more specific: what happens when a task takes 50, 100, or 200+ steps?
Most coding agents fall apart at scale. Context fills up, the model loses the thread, and it either halts or confidently completes the wrong thing. MiMo Code is explicitly engineered around those failure modes.
"A single step error rate gets amplified across long-horizon runs, with no human correction signal in the loop."
That framing shapes every architectural decision they made.
What actually changed (vs. standard coding agents)
