Noometry

Model comparison

Claude 3 Sonnet vs Grok 4.5

Grok 4.5 is the stronger model overall, scoring 55.0 to 29.0 on the Noometry Index.

Last verified . 23 shared benchmarks.

Claude 3 Sonnet Anthropic

29.0

Rank #319 Confirmed

Grok 4.5 xAI

55.0

Rank #25 Confirmed

Summary

  • They share 23 benchmarks with published results for both. Claude 3 Sonnet scores higher in 0 categories and Grok 4.5 in 9 categories; 9 gaps are clear of the uncertainty.
  • The widest gap is in math, where Grok 4.5 leads 60.9 to 10.7.
  • The biggest single-benchmark swing is OTIS Mock AIME 2024-2025: 2.5% for Claude 3 Sonnet and 97.8% for Grok 4.5.

Side by side

Claude 3 SonnetGrok 4.5
ProviderAnthropicxAI
Noometry Index29.055.0
Released2024-02-292026-07-08
WeightsProprietaryProprietary
Context window—500K
Max output—500K
Input $ / M tokens—$2
Output $ / M tokens—$6
Results tracked3052

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Category by category

Coding Grok 4.5 leads

Claude 3 Sonnet: 29.6 (#302), Grok 4.5: 52.2 (#35)

BenchmarkClaude 3 SonnetGrok 4.5
WeirdML10.2%46.4%
LMArena Coding12231474
DeepSWE—53.8%
FrontierCode—42.4%
LMArena WebDev—1553
SciCode—54.1%
BigCodeBench Instruct42.7%—
BigCodeBench Complete53.8%—
ALE-Bench—1,309
HumanEval+64%—
MBPP+69.3%—

Agentic & Tool Use Not comparable

Claude 3 Sonnet: —, Grok 4.5: 44.4 (#17)

BenchmarkClaude 3 SonnetGrok 4.5
APEX-Agents—56.2%
τ²-bench Banking—47.9%
PostTrainBench—23.4%
GBAEval—65.4%
GDP.pdf—14%
LMArena Search—1213
Vending-Bench 2—3,887

Reasoning Grok 4.5 leads

Claude 3 Sonnet: 20.5 (#237), Grok 4.5: 56.1 (#25)

BenchmarkClaude 3 SonnetGrok 4.5
LMArena Hard Prompts11971462
DTBench53.6%96.5%
Epoch Capabilities Index120.7153.92
ARC-AGI-2—52.6%
SimpleBench—70%
Kagi LLM Benchmark—83.5%
NYT Connections (extended)—79.9%
ARC-AGI-1—87.2%
CritPt—15.4%
Chess Puzzles—36%
LMCA—45.2%
Surface Evolver Bench—74.4%
WinoGrande75.1%—

Math Grok 4.5 leads

Claude 3 Sonnet: 10.7 (#310), Grok 4.5: 60.9 (#35)

BenchmarkClaude 3 SonnetGrok 4.5
OTIS Mock AIME 2024-20252.5%97.8%
LMArena Math12131459
FrontierMath (Tiers 1-3)—57.2%
FrontierMath Tier 4—24.4%
ProofBench—31%
MATH Level 518.2%—

Knowledge Grok 4.5 leads

Claude 3 Sonnet: 21.1 (#276), Grok 4.5: 62.3 (#24)

BenchmarkClaude 3 SonnetGrok 4.5
GPQA Diamond40.6%93.4%
LMArena Expert11731466
SimpleQA Verified—48.3%
MMLU75.9%—

Multimodal Grok 4.5 leads

Claude 3 Sonnet: 25.2 (#125), Grok 4.5: 37.6 (#72)

BenchmarkClaude 3 SonnetGrok 4.5
LMArena Vision9841288
Blueprint-Bench 2—27.3%
Furniture Assembly—22.5%
LMArena Document—1452

Multilingual Grok 4.5 leads

Claude 3 Sonnet: 37.8 (#234), Grok 4.5: 54.4 (#42)

BenchmarkClaude 3 SonnetGrok 4.5
LMArena Non-English12051440
LMArena Chinese11891496
LMArena French12291456
LMArena German12041446
LMArena Japanese11311428
LMArena Korean11281404
LMArena Russian12271448
LMArena Spanish12041450

Instruction Following Grok 4.5 leads

Claude 3 Sonnet: 62.8 (#235), Grok 4.5: 76.0 (#48)

BenchmarkClaude 3 SonnetGrok 4.5
LMArena Instruction Following11991446

Long Context Grok 4.5 leads

Claude 3 Sonnet: 36.7 (#228), Grok 4.5: 44.8 (#56)

BenchmarkClaude 3 SonnetGrok 4.5
LMArena Longer Query12111463

Writing & Preference Grok 4.5 leads

Claude 3 Sonnet: 42.1 (#238), Grok 4.5: 65.8 (#42)

BenchmarkClaude 3 SonnetGrok 4.5
LMArena Text12181448
LMArena Creative Writing11861442
LMArena Multi-Turn12271456
EQ-Bench Creative Writing—1579

Frequently asked questions

Is Claude 3 Sonnet better than Grok 4.5?

Grok 4.5 is the stronger model overall, scoring 55.0 to 29.0 on the Noometry Index.

Is Claude 3 Sonnet or Grok 4.5 better for coding?

Grok 4.5 scores higher on coding benchmarks: 52.2 versus 29.6 in the Noometry coding category.

How many benchmarks do Claude 3 Sonnet and Grok 4.5 share?

23 benchmarks have published results for both models. Claude 3 Sonnet has 30 scored results on Noometry and Grok 4.5 has 52.

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