Noometry

Model comparison

Grok 4 vs MiMo-V2-Flash

Grok 4 is the stronger model overall, scoring 48.1 to 41.3 on the Noometry Index.

Last verified . 17 shared benchmarks.

Grok 4 xAI

48.1

Rank #56 Confirmed

MiMo-V2-Flash Xiaomi

41.3

Rank #138 Confirmed

Summary

  • They share 17 benchmarks with published results for both. Grok 4 scores higher in 7 categories and MiMo-V2-Flash in 1 category; 7 gaps are clear of the uncertainty.
  • The widest gap is in long context, where Grok 4 leads 63.1 to 43.0.
  • MiMo-V2-Flash has downloadable open weights; the other is API-only.

Side by side

Grok 4MiMo-V2-Flash
ProviderxAIXiaomi
Noometry Index48.141.3
Released2025-07-092025-12-16
WeightsProprietaryOpen
Context window—262K
Max output—66K
Input $ / M tokens—$0.14
Output $ / M tokens—$0.28
Results tracked4821

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Category by category

Coding Grok 4 leads

Grok 4: 50.3 (#46), MiMo-V2-Flash: 36.1 (#211)

BenchmarkGrok 4MiMo-V2-Flash
LMArena Coding14081443
Aider Polyglot79.6%—
LMArena WebDev—1330
SciCode—25.9%
WeirdML45.7%—
ALE-Bench—737.95

Agentic & Tool Use Not comparable

Grok 4: 32.3 (#68), MiMo-V2-Flash: —

BenchmarkGrok 4MiMo-V2-Flash
Terminal-Bench27.2%—
Berkeley Function Calling Leaderboard63%—
GDPval21.1%—
Cybench43%—
DeepResearch Bench47.3%—
BALROG43.6%—
LMArena Search1142—
METR Time Horizons66.6%—

Reasoning Grok 4 leads

Grok 4: 36.7 (#65), MiMo-V2-Flash: 24.9 (#157)

BenchmarkGrok 4MiMo-V2-Flash
LMArena Hard Prompts14091420
ARC-AGI-216%—
SimpleBench60.5%—
Kagi LLM Benchmark73.6%—
ARC-AGI-166.7%—
CritPt—0%
Chess Puzzles28%—
Epoch Capabilities Index146.44—
ForecastBench60.9—

Math Grok 4 leads

Grok 4: 48.4 (#64), MiMo-V2-Flash: 38.3 (#139)

BenchmarkGrok 4MiMo-V2-Flash
LMArena Math14221396
OTIS Mock AIME 2024-202584%—
Omni-MATH60.3%—
FrontierMath (Feb 2025 set)19.7%—
FrontierMath Tier 4 (v1)2.1%—

Knowledge Grok 4 leads

Grok 4: 53.8 (#55), MiMo-V2-Flash: 39.7 (#131)

BenchmarkGrok 4MiMo-V2-Flash
LMArena Expert14151425
GPQA Diamond87%—
MMLU-Pro85.1%—
Confabulations12.4%—
GPQA (HELM)72.7%—

Multimodal Not comparable

Grok 4: 33.7 (#94), MiMo-V2-Flash: —

BenchmarkGrok 4MiMo-V2-Flash
LMArena Vision1210—
GeoBench45%—

Multilingual Too close to call

Grok 4: 51.8 (#103), MiMo-V2-Flash: 51.0 (#113)

BenchmarkGrok 4MiMo-V2-Flash
LMArena Non-English14031392
LMArena Chinese14271462
LMArena French14181429
LMArena German14291395
LMArena Japanese13941325
LMArena Korean13771358
LMArena Russian14101387
LMArena Spanish14201420

Instruction Following Grok 4 leads

Grok 4: 79.2 (#5), MiMo-V2-Flash: 73.5 (#120)

BenchmarkGrok 4MiMo-V2-Flash
LMArena Instruction Following13871392
IFEval94.9%—

Long Context Grok 4 leads

Grok 4: 63.1 (#4), MiMo-V2-Flash: 43.0 (#110)

BenchmarkGrok 4MiMo-V2-Flash
LMArena Longer Query14091409
Fiction.LiveBench94.4%—

Writing & Preference MiMo-V2-Flash leads

Grok 4: 58.5 (#116), MiMo-V2-Flash: 59.7 (#106)

BenchmarkGrok 4MiMo-V2-Flash
LMArena Text14111411
LMArena Creative Writing13971375
LMArena Multi-Turn14161404
Short-Story Creative Writing76.9%—
WildBench79.7%—

Frequently asked questions

Is Grok 4 better than MiMo-V2-Flash?

Grok 4 is the stronger model overall, scoring 48.1 to 41.3 on the Noometry Index.

Is Grok 4 or MiMo-V2-Flash better for coding?

Grok 4 scores higher on coding benchmarks: 50.3 versus 36.1 in the Noometry coding category.

How many benchmarks do Grok 4 and MiMo-V2-Flash share?

17 benchmarks have published results for both models. Grok 4 has 48 scored results on Noometry and MiMo-V2-Flash has 21.

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