Noometry

Model comparison

Grok 4.7 vs Grok 4 Fast

Grok 4.7 is the stronger model overall, scoring 53.1 to 39.4 on the Noometry Index.

Last verified . 17 shared benchmarks.

Grok 4.7 xAI

53.1

Rank #37 Confirmed

Grok 4 Fast xAI

39.4

Rank #167 Confirmed

Summary

  • They share 17 benchmarks with published results for both. Grok 4.7 scores higher in 7 categories and Grok 4 Fast in 2 categories; 7 gaps are clear of the uncertainty.
  • The widest gap is in knowledge, where Grok 4.7 leads 62.8 to 32.0.
  • The biggest single-benchmark swing is DTBench: 96% for Grok 4.7 and 82.7% for Grok 4 Fast.

Side by side

Grok 4.7Grok 4 Fast
ProviderxAIxAI
Noometry Index53.139.4
Released2026-09-212025-09-19
WeightsProprietaryProprietary
Context window500K—
Max output500K—
Input $ / M tokens$2—
Output $ / M tokens$6—
Results tracked3930

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Category by category

Coding Grok 4.7 leads

Grok 4.7: 58.0 (#18), Grok 4 Fast: 32.5 (#271)

BenchmarkGrok 4.7Grok 4 Fast
LMArena WebDev16391159
LMArena Coding14271429
FrontierCode47.6%—
CursorBench46.3%—
FrontierSWE29.5%—
SciCode57.8%—
WeirdML—42.9%

Agentic & Tool Use Grok 4.7 leads

Grok 4.7: 36.7 (#37), Grok 4 Fast: 29.5 (#86)

BenchmarkGrok 4.7Grok 4 Fast
APEX-Agents54.6%—
τ²-bench Banking—15.7%
Cybench—30%
GDP.pdf22.8%—
LMArena Search—1171
Vending-Bench 210,537—

Reasoning Grok 4.7 leads

Grok 4.7: 49.1 (#40), Grok 4 Fast: 22.2 (#201)

BenchmarkGrok 4.7Grok 4 Fast
LMArena Hard Prompts14131412
DTBench96%82.7%
Epoch Capabilities Index153.53144.2
ARC-AGI-2—5.3%
Kagi LLM Benchmark—66.1%
NYT Connections (extended)76.8%—
ARC-AGI-1—48.5%
CritPt18%—
Chess Puzzles38%—
Mystery Game Puzzles29%—
LMCA49.4%—
ForecastBench—60.5

Math Grok 4.7 leads

Grok 4.7: 57.8 (#39), Grok 4 Fast: 38.9 (#123)

BenchmarkGrok 4.7Grok 4 Fast
LMArena Math14071419
FrontierMath (Tiers 1-3)53%—
FrontierMath Tier 417.1%—
OTIS Mock AIME 2024-202598.1%—
ProofBench34%—

Knowledge Grok 4.7 leads

Grok 4.7: 62.8 (#22), Grok 4 Fast: 32.0 (#214)

BenchmarkGrok 4.7Grok 4 Fast
LMArena Expert14221411
GPQA Diamond92.7%—
SimpleQA Verified56%—
Vectara Hallucination Rate—19.7%

Multimodal Not comparable

Grok 4.7: 35.5 (#87), Grok 4 Fast: —

BenchmarkGrok 4.7Grok 4 Fast
LMArena Vision1228—
Blueprint-Bench 232.5%—
Furniture Assembly20.8%—

Multilingual Too close to call

Grok 4.7: 50.8 (#116), Grok 4 Fast: 51.3 (#111)

BenchmarkGrok 4.7Grok 4 Fast
LMArena Non-English13891396
LMArena Chinese14551457
LMArena French14551431
LMArena Russian13971389
LMArena Spanish14001415
LMArena German—1383
LMArena Japanese—1352
LMArena Korean—1357

Instruction Following Too close to call

Grok 4.7: 74.1 (#105), Grok 4 Fast: 73.2 (#121)

BenchmarkGrok 4.7Grok 4 Fast
LMArena Instruction Following14041387

Long Context Grok 4 Fast leads

Grok 4.7: 43.1 (#104), Grok 4 Fast: 63.2 (#3)

BenchmarkGrok 4.7Grok 4 Fast
LMArena Longer Query14131415
Fiction.LiveBench—94.4%

Writing & Preference Grok 4.7 leads

Grok 4.7: 70.0 (#24), Grok 4 Fast: 60.0 (#102)

BenchmarkGrok 4.7Grok 4 Fast
LMArena Text13991407
LMArena Creative Writing13911387
LMArena Multi-Turn13931414
EQ-Bench Creative Writing2007—

Frequently asked questions

Is Grok 4.7 better than Grok 4 Fast?

Grok 4.7 is the stronger model overall, scoring 53.1 to 39.4 on the Noometry Index.

Is Grok 4.7 or Grok 4 Fast better for coding?

Grok 4.7 scores higher on coding benchmarks: 58.0 versus 32.5 in the Noometry coding category.

How many benchmarks do Grok 4.7 and Grok 4 Fast share?

17 benchmarks have published results for both models. Grok 4.7 has 39 scored results on Noometry and Grok 4 Fast has 30.

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