Noometry

Model comparison

GPT-4.5 vs MiMo-V2.6-Flash

MiMo-V2.6-Flash is the stronger model overall, scoring 48.5 to 37.2 on the Noometry Index.

Last verified . 14 shared benchmarks.

GPT-4.5 OpenAI

37.2

Rank #208 Confirmed

MiMo-V2.6-Flash Xiaomi

48.5

Rank #55 Confirmed

Summary

  • They share 14 benchmarks with published results for both. GPT-4.5 scores higher in 0 categories and MiMo-V2.6-Flash in 9 categories; 9 gaps are clear of the uncertainty.
  • The widest gap is in reasoning, where MiMo-V2.6-Flash leads 36.5 to 13.9.
  • MiMo-V2.6-Flash has downloadable open weights; the other is API-only.

Side by side

GPT-4.5MiMo-V2.6-Flash
ProviderOpenAIXiaomi
Noometry Index37.248.5
Released2025-02-272026-09-21
WeightsProprietaryOpen
Context window—1.05M
Max output—131K
Input $ / M tokens—$0.14
Output $ / M tokens—$0.28
Results tracked4219

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Category by category

Coding MiMo-V2.6-Flash leads

GPT-4.5: 42.2 (#109), MiMo-V2.6-Flash: 53.4 (#30)

BenchmarkGPT-4.5MiMo-V2.6-Flash
LMArena Coding13961504
Aider Polyglot44.9%—
LMArena WebDev—1637
SciCode—51.3%
WeirdML39.4%—
LiveBench Coding75.2%—

Agentic & Tool Use Not comparable

GPT-4.5: 27.9 (#97), MiMo-V2.6-Flash: —

BenchmarkGPT-4.5MiMo-V2.6-Flash
Cybench17.5%—

Reasoning MiMo-V2.6-Flash leads

GPT-4.5: 13.9 (#330), MiMo-V2.6-Flash: 36.5 (#66)

BenchmarkGPT-4.5MiMo-V2.6-Flash
LMArena Hard Prompts14031482
ARC-AGI-20.8%—
SimpleBench34.5%—
ARC-AGI-110.3%—
CritPt—12%
EnigmaEval3.2%—
LiveBench Reasoning71.1%—
LiveBench Data Analysis64.3%—
Epoch Capabilities Index136.74—
ForecastBench61.7—
LiveBench69%—

Math MiMo-V2.6-Flash leads

GPT-4.5: 32.6 (#211), MiMo-V2.6-Flash: 51.9 (#52)

BenchmarkGPT-4.5MiMo-V2.6-Flash
LMArena Math14121468
OTIS Mock AIME 2024-202537.8%—
ProofBench—63%
LiveBench Math69.3%—
MATH Level 578.6%—

Knowledge MiMo-V2.6-Flash leads

GPT-4.5: 32.5 (#211), MiMo-V2.6-Flash: 42.2 (#99)

BenchmarkGPT-4.5MiMo-V2.6-Flash
LMArena Expert13941501
GPQA Diamond68.7%—
Humanity's Last Exam5.4%—
Confabulations13.6%—

Multimodal MiMo-V2.6-Flash leads

GPT-4.5: 37.6 (#71), MiMo-V2.6-Flash: 40.5 (#47)

BenchmarkGPT-4.5MiMo-V2.6-Flash
LMArena Vision11951259
VPCT45%—

Multilingual MiMo-V2.6-Flash leads

GPT-4.5: 52.5 (#83), MiMo-V2.6-Flash: 54.0 (#51)

BenchmarkGPT-4.5MiMo-V2.6-Flash
LMArena Non-English14131434
LMArena Chinese14211511
LMArena French14181475
LMArena Russian14191409
LMArena German1457—
LMArena Japanese1416—
LMArena Korean1392—
LMArena Spanish—1456

Instruction Following MiMo-V2.6-Flash leads

GPT-4.5: 72.6 (#134), MiMo-V2.6-Flash: 76.8 (#35)

BenchmarkGPT-4.5MiMo-V2.6-Flash
LMArena Instruction Following14041463
LiveBench Instruction Following72.3%—

Long Context MiMo-V2.6-Flash leads

GPT-4.5: 40.4 (#155), MiMo-V2.6-Flash: 44.8 (#57)

BenchmarkGPT-4.5MiMo-V2.6-Flash
LMArena Longer Query14061463
Fiction.LiveBench63.9%—

Writing & Preference MiMo-V2.6-Flash leads

GPT-4.5: 56.9 (#134), MiMo-V2.6-Flash: 63.1 (#67)

BenchmarkGPT-4.5MiMo-V2.6-Flash
LMArena Text14171455
LMArena Creative Writing13941400
LMArena Multi-Turn14441451
Short-Story Creative Writing75.6%—
EQ-Bench Creative Writing1258—
LiveBench Language61.5%—

Frequently asked questions

Is GPT-4.5 better than MiMo-V2.6-Flash?

MiMo-V2.6-Flash is the stronger model overall, scoring 48.5 to 37.2 on the Noometry Index.

Is GPT-4.5 or MiMo-V2.6-Flash better for coding?

MiMo-V2.6-Flash scores higher on coding benchmarks: 53.4 versus 42.2 in the Noometry coding category.

How many benchmarks do GPT-4.5 and MiMo-V2.6-Flash share?

14 benchmarks have published results for both models. GPT-4.5 has 42 scored results on Noometry and MiMo-V2.6-Flash has 19.

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