Side-by-side benchmark comparison across agentic, coding, multimodal, knowledge, reasoning, and math workflows.
MiMo-V2-Flash and Step 3.5 Flash finish on the same overall score, so this is less about a single winner and more about where the edge shows up. The headline says tie; the benchmark table is where the real choice happens.
MiMo-V2-Flash is the reasoning model in the pair, while Step 3.5 Flash is not. That usually helps on harder chain-of-thought-heavy tests, but it can also mean more latency and more token spend in real use. Step 3.5 Flash gives you the larger context window at 256K, compared with 128K for MiMo-V2-Flash.
Treat this as a split decision. MiMo-V2-Flash makes more sense if multimodal & grounded is the priority or you want the stronger reasoning-first profile; Step 3.5 Flash is the better fit if multilingual is the priority or you need the larger 256K context window.
MiMo-V2-Flash
61.8
Step 3.5 Flash
60.2
MiMo-V2-Flash
50
Step 3.5 Flash
47.1
MiMo-V2-Flash
75.8
Step 3.5 Flash
66.7
MiMo-V2-Flash
75.3
Step 3.5 Flash
78.3
MiMo-V2-Flash
58.8
Step 3.5 Flash
60.8
MiMo-V2-Flash
84
Step 3.5 Flash
87
MiMo-V2-Flash
79.1
Step 3.5 Flash
82.8
MiMo-V2-Flash
83.4
Step 3.5 Flash
84.5
MiMo-V2-Flash and Step 3.5 Flash are tied on overall score, so the right pick depends on which category matters most for your use case.
Step 3.5 Flash has the edge for knowledge tasks in this comparison, averaging 60.8 versus 58.8. Inside this category, MMLU is the benchmark that creates the most daylight between them.
MiMo-V2-Flash has the edge for coding in this comparison, averaging 50 versus 47.1. Inside this category, HumanEval is the benchmark that creates the most daylight between them.
Step 3.5 Flash has the edge for math in this comparison, averaging 84.5 versus 83.4. Inside this category, AIME 2023 is the benchmark that creates the most daylight between them.
Step 3.5 Flash has the edge for reasoning in this comparison, averaging 78.3 versus 75.3. Inside this category, MuSR is the benchmark that creates the most daylight between them.
MiMo-V2-Flash has the edge for agentic tasks in this comparison, averaging 61.8 versus 60.2. Inside this category, OSWorld-Verified is the benchmark that creates the most daylight between them.
MiMo-V2-Flash has the edge for multimodal and grounded tasks in this comparison, averaging 75.8 versus 66.7. Inside this category, MMMU-Pro is the benchmark that creates the most daylight between them.
Step 3.5 Flash has the edge for instruction following in this comparison, averaging 87 versus 84. Inside this category, IFEval is the benchmark that creates the most daylight between them.
Step 3.5 Flash has the edge for multilingual tasks in this comparison, averaging 82.8 versus 79.1. Inside this category, MMLU-ProX is the benchmark that creates the most daylight between them.
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