Noometry

Model comparison

Command R+ vs Grok 4 Fast

Grok 4 Fast is the stronger model overall, scoring 39.4 to 32.4 on the Noometry Index.

Last verified . 20 shared benchmarks.

Command R+ Cohere

32.4

Rank #257 Confirmed

Grok 4 Fast xAI

39.4

Rank #167 Confirmed

Summary

  • They share 20 benchmarks with published results for both. Command R+ scores higher in 1 category and Grok 4 Fast in 7 categories; 8 gaps are clear of the uncertainty.
  • The widest gap is in long context, where Grok 4 Fast leads 63.2 to 37.3.
  • The biggest single-benchmark swing is DTBench: 54.9% for Command R+ and 82.7% for Grok 4 Fast.
  • Command R+ has downloadable open weights; the other is API-only.

Side by side

Command R+Grok 4 Fast
ProviderCoherexAI
Noometry Index32.439.4
Released2024-08-302025-09-19
WeightsOpenProprietary
Context window128K—
Max output4K—
Input $ / M tokens$2.50—
Output $ / M tokens$10—
Results tracked3430

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Category by category

Coding Grok 4 Fast leads

Command R+: 29.1 (#309), Grok 4 Fast: 32.5 (#271)

BenchmarkCommand R+Grok 4 Fast
LMArena Coding11871429
LMArena WebDev—1159
WeirdML—42.9%
BigCodeBench Instruct33.8%—
LiveBench Coding19.1%—
BigCodeBench Complete41.9%—
HumanEval+56.7%—
MBPP+63.5%—

Agentic & Tool Use Not comparable

Command R+: —, Grok 4 Fast: 29.5 (#86)

BenchmarkCommand R+Grok 4 Fast
τ²-bench Banking—15.7%
Cybench—30%
LMArena Search—1171

Reasoning Grok 4 Fast leads

Command R+: 9.2 (#344), Grok 4 Fast: 22.2 (#201)

BenchmarkCommand R+Grok 4 Fast
LMArena Hard Prompts11861412
DTBench54.9%82.7%
Epoch Capabilities Index119.34144.2
ARC-AGI-2—5.3%
SimpleBench17.4%—
Kagi LLM Benchmark—66.1%
ARC-AGI-1—48.5%
LiveBench Reasoning24.8%—
LiveBench Data Analysis38.1%—
LMCA5%—
ForecastBench—60.5
LiveBench31.8%—

Math Grok 4 Fast leads

Command R+: 28.9 (#242), Grok 4 Fast: 38.9 (#123)

BenchmarkCommand R+Grok 4 Fast
LMArena Math11881419
LiveBench Math21.3%—

Knowledge Command R+ leads

Command R+: 36.4 (#169), Grok 4 Fast: 32.0 (#214)

BenchmarkCommand R+Grok 4 Fast
Vectara Hallucination Rate6.9%19.7%
LMArena Expert11741411
MMLU69.4%—

Multilingual Grok 4 Fast leads

Command R+: 38.6 (#227), Grok 4 Fast: 51.3 (#111)

BenchmarkCommand R+Grok 4 Fast
LMArena Non-English12161396
LMArena Chinese12261457
LMArena French12091431
LMArena German12161383
LMArena Japanese11661352
LMArena Korean11381357
LMArena Russian12271389
LMArena Spanish11891415

Instruction Following Grok 4 Fast leads

Command R+: 60.0 (#254), Grok 4 Fast: 73.2 (#121)

BenchmarkCommand R+Grok 4 Fast
LMArena Instruction Following11971387
LiveBench Instruction Following57.6%—

Long Context Grok 4 Fast leads

Command R+: 37.3 (#219), Grok 4 Fast: 63.2 (#3)

BenchmarkCommand R+Grok 4 Fast
LMArena Longer Query12301415
Fiction.LiveBench—94.4%

Writing & Preference Grok 4 Fast leads

Command R+: 43.5 (#228), Grok 4 Fast: 60.0 (#102)

BenchmarkCommand R+Grok 4 Fast
LMArena Text12291407
LMArena Creative Writing12351387
LMArena Multi-Turn12131414
LiveBench Language29.7%—

Frequently asked questions

Is Command R+ better than Grok 4 Fast?

Grok 4 Fast is the stronger model overall, scoring 39.4 to 32.4 on the Noometry Index.

Is Command R+ or Grok 4 Fast better for coding?

Grok 4 Fast scores higher on coding benchmarks: 32.5 versus 29.1 in the Noometry coding category.

How many benchmarks do Command R+ and Grok 4 Fast share?

20 benchmarks have published results for both models. Command R+ has 34 scored results on Noometry and Grok 4 Fast has 30.

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