Noometry

Model comparison

MiMo-V2.6-Flash vs Step 5 Preview

MiMo-V2.6-Flash and Step 5 Preview score almost the same on the Noometry Index (48.5 vs 47.9), so choose on price, context window or the category you care about most.

Last verified . 18 shared benchmarks.

MiMo-V2.6-Flash Xiaomi

48.5

Rank #55 Confirmed

Step 5 Preview StepFun

47.9

Rank #58 Confirmed

Summary

  • They share 18 benchmarks with published results for both. MiMo-V2.6-Flash scores higher in 7 categories and Step 5 Preview in 2 categories; 4 gaps are clear of the uncertainty.
  • The widest gap is in math, where MiMo-V2.6-Flash leads 51.9 to 46.1.
  • The biggest single-benchmark swing is ProofBench: 63% for MiMo-V2.6-Flash and 42% for Step 5 Preview.
  • MiMo-V2.6-Flash is cheaper at $0.14 / $0.28 per million input/output tokens, against $1 / $2.70 for Step 5 Preview.
  • MiMo-V2.6-Flash accepts more context: 1.05M tokens versus 1.02M.
  • MiMo-V2.6-Flash has downloadable open weights; the other is API-only.

Side by side

MiMo-V2.6-FlashStep 5 Preview
ProviderXiaomiStepFun
Noometry Index48.547.9
Released2026-09-212026-09-16
WeightsOpenProprietary
Context window1.05M1.02M
Max output131K66K
Input $ / M tokens$0.14$1
Output $ / M tokens$0.28$2.70
Results tracked1918

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Category by category

Coding MiMo-V2.6-Flash leads

MiMo-V2.6-Flash: 53.4 (#30), Step 5 Preview: 51.8 (#36)

BenchmarkMiMo-V2.6-FlashStep 5 Preview
LMArena WebDev16371564
SciCode51.3%58.9%
LMArena Coding15041480

Reasoning Step 5 Preview leads

MiMo-V2.6-Flash: 36.5 (#66), Step 5 Preview: 40.0 (#57)

BenchmarkMiMo-V2.6-FlashStep 5 Preview
CritPt12%20.9%
LMArena Hard Prompts14821465

Math MiMo-V2.6-Flash leads

MiMo-V2.6-Flash: 51.9 (#52), Step 5 Preview: 46.1 (#72)

BenchmarkMiMo-V2.6-FlashStep 5 Preview
ProofBench63%42%
LMArena Math14681470

Knowledge MiMo-V2.6-Flash leads

MiMo-V2.6-Flash: 42.2 (#99), Step 5 Preview: 41.2 (#112)

BenchmarkMiMo-V2.6-FlashStep 5 Preview
LMArena Expert15011470

Multimodal Too close to call

MiMo-V2.6-Flash: 40.5 (#47), Step 5 Preview: 41.0 (#41)

BenchmarkMiMo-V2.6-FlashStep 5 Preview
LMArena Vision12591267

Multilingual Too close to call

MiMo-V2.6-Flash: 54.0 (#51), Step 5 Preview: 53.8 (#54)

BenchmarkMiMo-V2.6-FlashStep 5 Preview
LMArena Non-English14341432
LMArena Chinese15111519
LMArena Russian14091436
LMArena Spanish14561439
LMArena French1475—

Instruction Following Too close to call

MiMo-V2.6-Flash: 76.8 (#35), Step 5 Preview: 76.0 (#50)

BenchmarkMiMo-V2.6-FlashStep 5 Preview
LMArena Instruction Following14631444

Long Context Too close to call

MiMo-V2.6-Flash: 44.8 (#57), Step 5 Preview: 44.5 (#64)

BenchmarkMiMo-V2.6-FlashStep 5 Preview
LMArena Longer Query14631455

Writing & Preference Too close to call

MiMo-V2.6-Flash: 63.1 (#67), Step 5 Preview: 62.8 (#71)

BenchmarkMiMo-V2.6-FlashStep 5 Preview
LMArena Text14551442
LMArena Creative Writing14001410
LMArena Multi-Turn14511447

Frequently asked questions

Is MiMo-V2.6-Flash better than Step 5 Preview?

MiMo-V2.6-Flash and Step 5 Preview score almost the same on the Noometry Index (48.5 vs 47.9), so choose on price, context window or the category you care about most.

Which is cheaper, MiMo-V2.6-Flash or Step 5 Preview?

MiMo-V2.6-Flash is cheaper. It lists at $0.14 per million input tokens and $0.28 per million output tokens; Step 5 Preview lists at $1 and $2.70.

Is MiMo-V2.6-Flash or Step 5 Preview better for coding?

MiMo-V2.6-Flash scores higher on coding benchmarks: 53.4 versus 51.8 in the Noometry coding category.

Which has the bigger context window?

MiMo-V2.6-Flash does, with 1.05M tokens against 1.02M.

How many benchmarks do MiMo-V2.6-Flash and Step 5 Preview share?

18 benchmarks have published results for both models. MiMo-V2.6-Flash has 19 scored results on Noometry and Step 5 Preview has 18.

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