Noometry

Model comparison

Claude Opus 4.7 vs Grok 4 Fast

Claude Opus 4.7 is the stronger model overall, scoring 58.3 to 39.4 on the Noometry Index.

Last verified . 28 shared benchmarks.

Claude Opus 4.7 Anthropic

58.3

Rank #19 Confirmed

Grok 4 Fast xAI

39.4

Rank #167 Confirmed

Summary

  • They share 28 benchmarks with published results for both. Claude Opus 4.7 scores higher in 8 categories and Grok 4 Fast in 1 category; 9 gaps are clear of the uncertainty.
  • The widest gap is in reasoning, where Claude Opus 4.7 leads 53.8 to 22.2.
  • The biggest single-benchmark swing is ARC-AGI-2: 75.8% for Claude Opus 4.7 and 5.3% for Grok 4 Fast.

Side by side

Claude Opus 4.7Grok 4 Fast
ProviderAnthropicxAI
Noometry Index58.339.4
Released2026-04-142025-09-19
WeightsProprietaryProprietary
Context window1M—
Max output128K—
Input $ / M tokens$5—
Output $ / M tokens$25—
Results tracked6630

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Category by category

Coding Claude Opus 4.7 leads

Claude Opus 4.7: 59.6 (#13), Grok 4 Fast: 32.5 (#271)

BenchmarkClaude Opus 4.7Grok 4 Fast
LMArena WebDev15581159
WeirdML76.4%42.9%
LMArena Coding15181429
SWE-bench Verified83.5%—
FrontierCode38.5%—
SciCode54.5%—
GSO44.1%—
MirrorCode31.1%—
ALE-Bench1,323—

Agentic & Tool Use Claude Opus 4.7 leads

Claude Opus 4.7: 47.9 (#10), Grok 4 Fast: 29.5 (#86)

BenchmarkClaude Opus 4.7Grok 4 Fast
τ²-bench Banking40.2%15.7%
LMArena Search12331171
Terminal-Bench80.2%—
APEX-Agents49.2%—
OSWorld 2.018.2%—
Cybench—30%
PostTrainBench28.6%—
ExploitBench26.5%—
GBAEval43.8%—
GDP.pdf21%—
Vending-Bench 210,937—

Reasoning Claude Opus 4.7 leads

Claude Opus 4.7: 53.8 (#29), Grok 4 Fast: 22.2 (#201)

BenchmarkClaude Opus 4.7Grok 4 Fast
ARC-AGI-275.8%5.3%
Kagi LLM Benchmark80.7%66.1%
ARC-AGI-193.5%48.5%
LMArena Hard Prompts15061412
DTBench94.7%82.7%
Epoch Capabilities Index156.25144.2
ForecastBench60.360.5
SimpleBench61.7%—
NYT Connections (extended)39%—
CritPt12%—
Chess Puzzles30%—
Thematic Generalization72.8%—
EBR-Bench19%—
Mystery Game Puzzles28%—
LMCA52.2%—

Math Claude Opus 4.7 leads

Claude Opus 4.7: 66.7 (#26), Grok 4 Fast: 38.9 (#123)

BenchmarkClaude Opus 4.7Grok 4 Fast
LMArena Math14991419
FrontierMath (Tiers 1-3)70.2%—
FrontierMath Tier 431.7%—
MathArena Final-Answer Competitions73.6%—
OTIS Mock AIME 2024-202597.8%—
ProofBench54%—
FrontierMath (Feb 2025 set)43.8%—
FrontierMath Tier 4 (v1)22.9%—

Knowledge Claude Opus 4.7 leads

Claude Opus 4.7: 62.6 (#23), Grok 4 Fast: 32.0 (#214)

BenchmarkClaude Opus 4.7Grok 4 Fast
Vectara Hallucination Rate12%19.7%
LMArena Expert15211411
GPQA Diamond90.2%—
Humanity's Last Exam36.2%—
SimpleQA Verified51.7%—

Multimodal Not comparable

Claude Opus 4.7: 41.2 (#38), Grok 4 Fast: —

BenchmarkClaude Opus 4.7Grok 4 Fast
LMArena Vision1316—
Blueprint-Bench 224.5%—
Furniture Assembly33.3%—
LMArena Document1495—

Multilingual Claude Opus 4.7 leads

Claude Opus 4.7: 57.3 (#10), Grok 4 Fast: 51.3 (#111)

BenchmarkClaude Opus 4.7Grok 4 Fast
LMArena Non-English14801396
LMArena Chinese15311457
LMArena French15031431
LMArena German14951383
LMArena Japanese14721352
LMArena Korean14641357
LMArena Russian14941389
LMArena Spanish14951415

Instruction Following Claude Opus 4.7 leads

Claude Opus 4.7: 78.4 (#10), Grok 4 Fast: 73.2 (#121)

BenchmarkClaude Opus 4.7Grok 4 Fast
LMArena Instruction Following14981387

Long Context Grok 4 Fast leads

Claude Opus 4.7: 46.2 (#25), Grok 4 Fast: 63.2 (#3)

BenchmarkClaude Opus 4.7Grok 4 Fast
LMArena Longer Query15051415
Fiction.LiveBench—94.4%

Writing & Preference Claude Opus 4.7 leads

Claude Opus 4.7: 75.1 (#8), Grok 4 Fast: 60.0 (#102)

BenchmarkClaude Opus 4.7Grok 4 Fast
LMArena Text14901407
LMArena Creative Writing14861387
LMArena Multi-Turn15051414
EQ-Bench Creative Writing1914—
EQ-Bench 41311—

Frequently asked questions

Is Claude Opus 4.7 better than Grok 4 Fast?

Claude Opus 4.7 is the stronger model overall, scoring 58.3 to 39.4 on the Noometry Index.

Is Claude Opus 4.7 or Grok 4 Fast better for coding?

Claude Opus 4.7 scores higher on coding benchmarks: 59.6 versus 32.5 in the Noometry coding category.

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

28 benchmarks have published results for both models. Claude Opus 4.7 has 66 scored results on Noometry and Grok 4 Fast has 30.

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