Noometry

Model comparison

Claude Sonnet 4.5 vs Command A

Claude Sonnet 4.5 is the stronger model overall, scoring 44.1 to 36.5 on the Noometry Index.

Last verified . 23 shared benchmarks.

Claude Sonnet 4.5 Anthropic

44.1

Rank #81 Confirmed

Command A Cohere

36.5

Rank #215 Confirmed

Summary

  • They share 23 benchmarks with published results for both. Claude Sonnet 4.5 scores higher in 8 categories and Command A in 1 category; 9 gaps are clear of the uncertainty.
  • The widest gap is in coding, where Claude Sonnet 4.5 leads 47.3 to 27.2.
  • The biggest single-benchmark swing is Kagi LLM Benchmark: 57.9% for Claude Sonnet 4.5 and 28.8% for Command A.
  • Command A is cheaper at $2.50 / $10 per million input/output tokens, against $3 / $15 for Claude Sonnet 4.5.
  • Command A accepts more context: 256K tokens versus 200K.
  • Command A has downloadable open weights; the other is API-only.

Side by side

Claude Sonnet 4.5Command A
ProviderAnthropicCohere
Noometry Index44.136.5
Released2025-09-292025-03-13
WeightsProprietaryOpen
Context window200K256K
Max output64K8K
Input $ / M tokens$3$2.50
Output $ / M tokens$15$10
Results tracked7324

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Category by category

Coding Claude Sonnet 4.5 leads

Claude Sonnet 4.5: 47.3 (#61), Command A: 27.2 (#322)

BenchmarkClaude Sonnet 4.5Command A
LMArena Coding14891330
SWE-bench Verified71.3%—
SWE-bench Verified (bash only)71.4%—
Aider Polyglot—12%
LMArena WebDev1393—
SWE-bench Multilingual67%—
SciCode44.7%—
GSO14.7%—
WeirdML47.7%—
ALE-Bench796.15—
AlgoTune1.52—

Agentic & Tool Use Claude Sonnet 4.5 leads

Claude Sonnet 4.5: 38.3 (#32), Command A: 35.9 (#40)

BenchmarkClaude Sonnet 4.5Command A
Berkeley Function Calling Leaderboard73.2%57.1%
Terminal-Bench46.5%—
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), Command A: 18.3 (#283)

BenchmarkClaude Sonnet 4.5Command A
Kagi LLM Benchmark57.9%28.8%
LMArena Hard Prompts14621326
DTBench83.2%61.3%
LMCA38.8%10.3%
ARC-AGI-213.6%—
SimpleBench54.3%—
NYT Connections (extended)37.3%—
ARC-AGI-163.7%—
CritPt1.1%—
Chess Puzzles12%—
EnigmaEval6%—
EBR-Bench2.4%—
Mystery Game Puzzles17%—
Epoch Capabilities Index146.84—
ForecastBench61.9—

Math Command A leads

Claude Sonnet 4.5: 32.3 (#216), Command A: 36.2 (#171)

BenchmarkClaude Sonnet 4.5Command A
LMArena Math14491300
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), Command A: 37.1 (#159)

BenchmarkClaude Sonnet 4.5Command A
Vectara Hallucination Rate12%9.3%
LMArena Expert14821295
GPQA Diamond82.3%—
Humanity's Last Exam13.7%—
SimpleQA Verified30.7%—
MMLU-Pro86.9%—
GPQA (HELM)68.6%—

Multimodal Not comparable

Claude Sonnet 4.5: 34.8 (#89), Command A: —

BenchmarkClaude Sonnet 4.5Command A
VPCT39.8%—
LMArena Document1450—

Multilingual Claude Sonnet 4.5 leads

Claude Sonnet 4.5: 53.4 (#69), Command A: 45.3 (#170)

BenchmarkClaude Sonnet 4.5Command A
LMArena Non-English14251313
LMArena Chinese14591327
LMArena French14581351
LMArena German14271341
LMArena Japanese13901285
LMArena Korean14031285
LMArena Russian14371314
LMArena Spanish14571347

Instruction Following Claude Sonnet 4.5 leads

Claude Sonnet 4.5: 75.0 (#78), Command A: 69.1 (#177)

BenchmarkClaude Sonnet 4.5Command A
LMArena Instruction Following14591309
IFEval85%—

Long Context Claude Sonnet 4.5 leads

Claude Sonnet 4.5: 45.2 (#46), Command A: 40.6 (#151)

BenchmarkClaude Sonnet 4.5Command A
LMArena Longer Query14761334

Writing & Preference Claude Sonnet 4.5 leads

Claude Sonnet 4.5: 66.5 (#34), Command A: 47.6 (#208)

BenchmarkClaude Sonnet 4.5Command A
LMArena Text14391331
LMArena Creative Writing14421319
EQ-Bench Creative Writing16781145
LMArena Multi-Turn14651339
WildBench85.4%—

Frequently asked questions

Is Claude Sonnet 4.5 better than Command A?

Claude Sonnet 4.5 is the stronger model overall, scoring 44.1 to 36.5 on the Noometry Index.

Which is cheaper, Claude Sonnet 4.5 or Command A?

Command A is cheaper. It lists at $2.50 per million input tokens and $10 per million output tokens; Claude Sonnet 4.5 lists at $3 and $15.

Is Claude Sonnet 4.5 or Command A better for coding?

Claude Sonnet 4.5 scores higher on coding benchmarks: 47.3 versus 27.2 in the Noometry coding category.

Which has the bigger context window?

Command A does, with 256K tokens against 200K.

How many benchmarks do Claude Sonnet 4.5 and Command A share?

23 benchmarks have published results for both models. Claude Sonnet 4.5 has 73 scored results on Noometry and Command A has 24.

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