Noometry

Model comparison

Claude Sonnet 4.5 vs MiMo-V2-Flash

Claude Sonnet 4.5 is the stronger model overall, scoring 44.1 to 41.3 on the Noometry Index. MiMo-V2-Flash costs 34× less per token, which makes it the better buy when Claude Sonnet 4.5's lead doesn't matter for your workload.

Last verified . 21 shared benchmarks.

Claude Sonnet 4.5 Anthropic

44.1

Rank #81 Confirmed

MiMo-V2-Flash Xiaomi

41.3

Rank #138 Confirmed

Summary

  • They share 21 benchmarks with published results for both. Claude Sonnet 4.5 scores higher in 7 categories and MiMo-V2-Flash in 1 category; 8 gaps are clear of the uncertainty.
  • The widest gap is in coding, where Claude Sonnet 4.5 leads 47.3 to 36.1.
  • The biggest single-benchmark swing is SciCode: 44.7% for Claude Sonnet 4.5 and 25.9% for MiMo-V2-Flash.
  • MiMo-V2-Flash is cheaper at $0.14 / $0.28 per million input/output tokens, against $3 / $15 for Claude Sonnet 4.5.
  • MiMo-V2-Flash accepts more context: 262K tokens versus 200K.
  • MiMo-V2-Flash has downloadable open weights; the other is API-only.

Side by side

Claude Sonnet 4.5MiMo-V2-Flash
ProviderAnthropicXiaomi
Noometry Index44.141.3
Released2025-09-292025-12-16
WeightsProprietaryOpen
Context window200K262K
Max output64K66K
Input $ / M tokens$3$0.14
Output $ / M tokens$15$0.28
Results tracked7321

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Category by category

Coding Claude Sonnet 4.5 leads

Claude Sonnet 4.5: 47.3 (#61), MiMo-V2-Flash: 36.1 (#211)

BenchmarkClaude Sonnet 4.5MiMo-V2-Flash
LMArena WebDev13931330
SciCode44.7%25.9%
LMArena Coding14891443
ALE-Bench796.15737.95
SWE-bench Verified71.3%—
SWE-bench Verified (bash only)71.4%—
SWE-bench Multilingual67%—
GSO14.7%—
WeirdML47.7%—
AlgoTune1.52—

Agentic & Tool Use Not comparable

Claude Sonnet 4.5: 38.3 (#32), MiMo-V2-Flash: —

BenchmarkClaude Sonnet 4.5MiMo-V2-Flash
Terminal-Bench46.5%—
Berkeley Function Calling Leaderboard73.2%—
GDPval42.5%—
Remote Labor Index2.1%—
τ²-bench Airline72%—
τ²-bench Banking25.3%—
τ²-bench Retail72.4%—
τ²-bench Telecom84.9%—
Cybench60%—
DeepResearch Bench52.6%—
OSWorld62.9%—
LMArena Search1159—
METR Time Horizons67.4%—
Vending-Bench 23,839—

Reasoning Claude Sonnet 4.5 leads

Claude Sonnet 4.5: 26.9 (#125), MiMo-V2-Flash: 24.9 (#157)

BenchmarkClaude Sonnet 4.5MiMo-V2-Flash
CritPt1.1%0%
LMArena Hard Prompts14621420
ARC-AGI-213.6%—
SimpleBench54.3%—
Kagi LLM Benchmark57.9%—
NYT Connections (extended)37.3%—
ARC-AGI-163.7%—
Chess Puzzles12%—
EnigmaEval6%—
EBR-Bench2.4%—
Mystery Game Puzzles17%—
DTBench83.2%—
LMCA38.8%—
Epoch Capabilities Index146.84—
ForecastBench61.9—

Math MiMo-V2-Flash leads

Claude Sonnet 4.5: 32.3 (#216), MiMo-V2-Flash: 38.3 (#139)

BenchmarkClaude Sonnet 4.5MiMo-V2-Flash
LMArena Math14491396
FrontierMath (Tiers 1-3)23.9%—
FrontierMath Tier 42.4%—
OTIS Mock AIME 2024-202577.8%—
ProofBench19%—
Omni-MATH55.3%—
MATH Level 597.7%—
FrontierMath (Feb 2025 set)15.2%—
FrontierMath Tier 4 (v1)4.2%—

Knowledge Claude Sonnet 4.5 leads

Claude Sonnet 4.5: 48.4 (#76), MiMo-V2-Flash: 39.7 (#131)

BenchmarkClaude Sonnet 4.5MiMo-V2-Flash
LMArena Expert14821425
GPQA Diamond82.3%—
Humanity's Last Exam13.7%—
SimpleQA Verified30.7%—
MMLU-Pro86.9%—
Vectara Hallucination Rate12%—
GPQA (HELM)68.6%—

Multimodal Not comparable

Claude Sonnet 4.5: 34.8 (#89), MiMo-V2-Flash: —

BenchmarkClaude Sonnet 4.5MiMo-V2-Flash
VPCT39.8%—
LMArena Document1450—

Multilingual Claude Sonnet 4.5 leads

Claude Sonnet 4.5: 53.4 (#69), MiMo-V2-Flash: 51.0 (#113)

BenchmarkClaude Sonnet 4.5MiMo-V2-Flash
LMArena Non-English14251392
LMArena Chinese14591462
LMArena French14581429
LMArena German14271395
LMArena Japanese13901325
LMArena Korean14031358
LMArena Russian14371387
LMArena Spanish14571420

Instruction Following Claude Sonnet 4.5 leads

Claude Sonnet 4.5: 75.0 (#78), MiMo-V2-Flash: 73.5 (#120)

BenchmarkClaude Sonnet 4.5MiMo-V2-Flash
LMArena Instruction Following14591392
IFEval85%—

Long Context Claude Sonnet 4.5 leads

Claude Sonnet 4.5: 45.2 (#46), MiMo-V2-Flash: 43.0 (#110)

BenchmarkClaude Sonnet 4.5MiMo-V2-Flash
LMArena Longer Query14761409

Writing & Preference Claude Sonnet 4.5 leads

Claude Sonnet 4.5: 66.5 (#34), MiMo-V2-Flash: 59.7 (#106)

BenchmarkClaude Sonnet 4.5MiMo-V2-Flash
LMArena Text14391411
LMArena Creative Writing14421375
LMArena Multi-Turn14651404
EQ-Bench Creative Writing1678—
WildBench85.4%—

Frequently asked questions

Is Claude Sonnet 4.5 better than MiMo-V2-Flash?

Claude Sonnet 4.5 is the stronger model overall, scoring 44.1 to 41.3 on the Noometry Index. MiMo-V2-Flash costs 34× less per token, which makes it the better buy when Claude Sonnet 4.5's lead doesn't matter for your workload.

Which is cheaper, Claude Sonnet 4.5 or MiMo-V2-Flash?

MiMo-V2-Flash is cheaper. It lists at $0.14 per million input tokens and $0.28 per million output tokens; Claude Sonnet 4.5 lists at $3 and $15.

Is Claude Sonnet 4.5 or MiMo-V2-Flash better for coding?

Claude Sonnet 4.5 scores higher on coding benchmarks: 47.3 versus 36.1 in the Noometry coding category.

Which has the bigger context window?

MiMo-V2-Flash does, with 262K tokens against 200K.

How many benchmarks do Claude Sonnet 4.5 and MiMo-V2-Flash share?

21 benchmarks have published results for both models. Claude Sonnet 4.5 has 73 scored results on Noometry and MiMo-V2-Flash has 21.

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