MiMo V2.5 Pro Outperforms DeepSeek V4 Pro at Debugging but Loses on Speed

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A developer on DEV Community ran a real-world debugging test pitting DeepSeek V4 Pro against MiMo V2.5 Pro using a genuine race condition bug from the open-source httpcore library. Both models were given the full project codebase before the official fix and asked to identify the root cause and propose a solution. MiMo found three race conditions versus DeepSeek's one, delivered deeper analysis, and cost slightly less at $0.13 compared to $0.14. However, DeepSeek completed the task in roughly eight minutes while MiMo took about fifteen, using fewer tokens overall. The comparison suggests MiMo has an edge for debugging tasks, while DeepSeek may be better suited for faster code-writing scenarios.

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