Noometry

Model comparison

Claude Sonnet 4.5 vs Gemma 4 31B IT

Claude Sonnet 4.5 and Gemma 4 31B IT score almost the same on the Noometry Index (44.0 vs 43.2), so choose on price, context window or the category you care about most.

Last verified . 31 shared benchmarks.

Claude Sonnet 4.5 Anthropic

44.0

Rank #76 Confirmed

Gemma 4 31B IT Google

43.2

Rank #85 Confirmed

Summary

  • They share 31 benchmarks with published results for both. Claude Sonnet 4.5 scores higher in 5 categories and Gemma 4 31B IT in 4 categories; 5 gaps are clear of the uncertainty.
  • The widest gap is in knowledge, where Claude Sonnet 4.5 leads 48.4 to 37.9.
  • The biggest single-benchmark swing is NYT Connections (extended): 37.3% for Claude Sonnet 4.5 and 70.6% for Gemma 4 31B IT.
  • Gemma 4 31B IT is cheaper at $0.09 / $0.34 per million input/output tokens, against $3 / $15 for Claude Sonnet 4.5.
  • Claude Sonnet 4.5 accepts more context: 1M tokens versus 262K.
  • Gemma 4 31B IT has downloadable open weights; the other is API-only.

Side by side

Claude Sonnet 4.5Gemma 4 31B IT
ProviderAnthropicGoogle
Noometry Index44.043.2
Released2025-09-292026-04-02
WeightsProprietaryOpen
Context window1M262K
Max output64K33K
Input $ / M tokens$3$0.09
Output $ / M tokens$15$0.34
Results tracked7335

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Category by category

Coding Claude Sonnet 4.5 leads

Claude Sonnet 4.5: 47.8 (#54), Gemma 4 31B IT: 41.9 (#98)

BenchmarkClaude Sonnet 4.5Gemma 4 31B IT
LMArena WebDev13931364
SciCode44.7%43.4%
WeirdML47.7%52.3%
LMArena Coding14891459
ALE-Bench796.15925.5
SWE-bench Verified71.3%—
SWE-bench Verified (bash only)71.4%—
SWE-bench Multilingual67%—
GSO14.7%—
AlgoTune1.52—

Agentic & Tool Use Not comparable

Claude Sonnet 4.5: 38.1 (#30), Gemma 4 31B IT: —

BenchmarkClaude Sonnet 4.5Gemma 4 31B IT
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 Too close to call

Claude Sonnet 4.5: 26.9 (#113), Gemma 4 31B IT: 26.4 (#119)

BenchmarkClaude Sonnet 4.5Gemma 4 31B IT
Kagi LLM Benchmark57.9%63.5%
NYT Connections (extended)37.3%70.6%
CritPt1.1%1.4%
Chess Puzzles12%5%
LMArena Hard Prompts14621448
DTBench83.2%82.7%
LMCA38.8%39.3%
Epoch Capabilities Index146.84142.74
ARC-AGI-213.6%—
SimpleBench54.3%—
ARC-AGI-163.7%—
EnigmaEval6%—
Thematic Generalization—53%
EBR-Bench2.4%—
Mystery Game Puzzles17%—
Surface Evolver Bench—30.6%
ForecastBench61.9—

Math Gemma 4 31B IT leads

Claude Sonnet 4.5: 31.9 (#190), Gemma 4 31B IT: 41.3 (#72)

BenchmarkClaude Sonnet 4.5Gemma 4 31B IT
OTIS Mock AIME 2024-202577.8%73.3%
LMArena Math14481464
FrontierMath (Tiers 1-3)23.9%—
FrontierMath Tier 42.4%—
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 (#70), Gemma 4 31B IT: 37.9 (#141)

BenchmarkClaude Sonnet 4.5Gemma 4 31B IT
GPQA Diamond82.3%75.8%
SimpleQA Verified30.7%10.4%
Vectara Hallucination Rate12%7.4%
LMArena Expert14831465
Humanity's Last Exam13.7%—
MMLU-Pro86.9%—
GPQA (HELM)68.6%—

Multimodal Gemma 4 31B IT leads

Claude Sonnet 4.5: 34.1 (#84), Gemma 4 31B IT: 41.0 (#32)

BenchmarkClaude Sonnet 4.5Gemma 4 31B IT
LMArena Document14501425
LMArena Vision—1278
VPCT39.8%—

Multilingual Too close to call

Claude Sonnet 4.5: 53.6 (#65), Gemma 4 31B IT: 54.0 (#52)

BenchmarkClaude Sonnet 4.5Gemma 4 31B IT
LMArena Non-English14251431
LMArena Chinese14591478
LMArena French14591436
LMArena Russian14361462
LMArena Spanish14571443
LMArena German1427—
LMArena Japanese1390—
LMArena Korean1403—

Instruction Following Too close to call

Claude Sonnet 4.5: 75.2 (#74), Gemma 4 31B IT: 75.6 (#58)

BenchmarkClaude Sonnet 4.5Gemma 4 31B IT
LMArena Instruction Following14591433
IFEval85%—

Long Context Too close to call

Claude Sonnet 4.5: 45.2 (#45), Gemma 4 31B IT: 44.2 (#67)

BenchmarkClaude Sonnet 4.5Gemma 4 31B IT
LMArena Longer Query14761446

Writing & Preference Claude Sonnet 4.5 leads

Claude Sonnet 4.5: 66.7 (#33), Gemma 4 31B IT: 60.7 (#92)

BenchmarkClaude Sonnet 4.5Gemma 4 31B IT
LMArena Text14391443
LMArena Creative Writing14421416
EQ-Bench Creative Writing16781368
LMArena Multi-Turn14651452
WildBench85.4%—
EQ-Bench 4—1120

Frequently asked questions

Is Claude Sonnet 4.5 better than Gemma 4 31B IT?

Claude Sonnet 4.5 and Gemma 4 31B IT score almost the same on the Noometry Index (44.0 vs 43.2), so choose on price, context window or the category you care about most.

Which is cheaper, Claude Sonnet 4.5 or Gemma 4 31B IT?

Gemma 4 31B IT is cheaper. It lists at $0.09 per million input tokens and $0.34 per million output tokens; Claude Sonnet 4.5 lists at $3 and $15.

Is Claude Sonnet 4.5 or Gemma 4 31B IT better for coding?

Claude Sonnet 4.5 scores higher on coding benchmarks: 47.8 versus 41.9 in the Noometry coding category.

Which has the bigger context window?

Claude Sonnet 4.5 does, with 1M tokens against 262K.

How many benchmarks do Claude Sonnet 4.5 and Gemma 4 31B IT share?

31 benchmarks have published results for both models. Claude Sonnet 4.5 has 73 scored results on Noometry and Gemma 4 31B IT has 35.

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