Noometry

Model comparison

Gemini 3.6 Flash vs Grok 4 Fast

Gemini 3.6 Flash is the stronger model overall, scoring 54.1 to 39.4 on the Noometry Index.

Last verified . 23 shared benchmarks.

Gemini 3.6 Flash Google

54.1

Rank #33 Confirmed

Grok 4 Fast xAI

39.4

Rank #167 Confirmed

Summary

  • They share 23 benchmarks with published results for both. Gemini 3.6 Flash 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 Gemini 3.6 Flash leads 58.8 to 22.2.
  • The biggest single-benchmark swing is ARC-AGI-2: 60.4% for Gemini 3.6 Flash and 5.3% for Grok 4 Fast.

Side by side

Gemini 3.6 FlashGrok 4 Fast
ProviderGooglexAI
Noometry Index54.139.4
Released2026-07-212025-09-19
WeightsProprietaryProprietary
Context window1.05M—
Max output66K—
Input $ / M tokens$0.75—
Output $ / M tokens$3.75—
Results tracked4630

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Category by category

Coding Gemini 3.6 Flash leads

Gemini 3.6 Flash: 50.0 (#48), Grok 4 Fast: 32.5 (#271)

BenchmarkGemini 3.6 FlashGrok 4 Fast
LMArena WebDev15381159
WeirdML56.1%42.9%
LMArena Coding14911429
DeepSWE46.7%—
FrontierCode34.4%—
SciCode52.7%—
ALE-Bench715.52—

Agentic & Tool Use Gemini 3.6 Flash leads

Gemini 3.6 Flash: 32.3 (#65), Grok 4 Fast: 29.5 (#86)

BenchmarkGemini 3.6 FlashGrok 4 Fast
APEX-Agents46.9%—
τ²-bench Banking—15.7%
Cybench—30%
GDP.pdf14%—
LMArena Search—1171

Reasoning Gemini 3.6 Flash leads

Gemini 3.6 Flash: 58.8 (#22), Grok 4 Fast: 22.2 (#201)

BenchmarkGemini 3.6 FlashGrok 4 Fast
ARC-AGI-260.4%5.3%
ARC-AGI-191.2%48.5%
LMArena Hard Prompts14851412
DTBench95.5%82.7%
Epoch Capabilities Index154.25144.2
Kagi LLM Benchmark—66.1%
NYT Connections (extended)89%—
CritPt10.6%—
Chess Puzzles43%—
Mystery Game Puzzles30%—
LMCA44.9%—
ForecastBench—60.5

Math Gemini 3.6 Flash leads

Gemini 3.6 Flash: 57.3 (#40), Grok 4 Fast: 38.9 (#123)

BenchmarkGemini 3.6 FlashGrok 4 Fast
LMArena Math15051419
FrontierMath (Tiers 1-3)58.9%—
FrontierMath Tier 422%—
MathArena Final-Answer Competitions70.8%—
OTIS Mock AIME 2024-202594.2%—
ProofBench36%—

Knowledge Gemini 3.6 Flash leads

Gemini 3.6 Flash: 67.8 (#8), Grok 4 Fast: 32.0 (#214)

BenchmarkGemini 3.6 FlashGrok 4 Fast
LMArena Expert14881411
GPQA Diamond94.1%—
SimpleQA Verified66.2%—
Vectara Hallucination Rate—19.7%

Multimodal Not comparable

Gemini 3.6 Flash: 38.5 (#64), Grok 4 Fast: —

BenchmarkGemini 3.6 FlashGrok 4 Fast
LMArena Vision1298—
Blueprint-Bench 231.2%—
Furniture Assembly23.3%—
LMArena Document1456—

Multilingual Gemini 3.6 Flash leads

Gemini 3.6 Flash: 56.5 (#19), Grok 4 Fast: 51.3 (#111)

BenchmarkGemini 3.6 FlashGrok 4 Fast
LMArena Non-English14691396
LMArena Chinese15311457
LMArena French15041431
LMArena German14781383
LMArena Japanese14761352
LMArena Korean14311357
LMArena Russian14871389
LMArena Spanish14751415

Instruction Following Gemini 3.6 Flash leads

Gemini 3.6 Flash: 77.0 (#33), Grok 4 Fast: 73.2 (#121)

BenchmarkGemini 3.6 FlashGrok 4 Fast
LMArena Instruction Following14661387

Long Context Grok 4 Fast leads

Gemini 3.6 Flash: 45.1 (#50), Grok 4 Fast: 63.2 (#3)

BenchmarkGemini 3.6 FlashGrok 4 Fast
LMArena Longer Query14741415
Fiction.LiveBench—94.4%

Writing & Preference Gemini 3.6 Flash leads

Gemini 3.6 Flash: 68.2 (#27), Grok 4 Fast: 60.0 (#102)

BenchmarkGemini 3.6 FlashGrok 4 Fast
LMArena Text14791407
LMArena Creative Writing14651387
LMArena Multi-Turn14811414
EQ-Bench Creative Writing1604—

Frequently asked questions

Is Gemini 3.6 Flash better than Grok 4 Fast?

Gemini 3.6 Flash is the stronger model overall, scoring 54.1 to 39.4 on the Noometry Index.

Is Gemini 3.6 Flash or Grok 4 Fast better for coding?

Gemini 3.6 Flash scores higher on coding benchmarks: 50.0 versus 32.5 in the Noometry coding category.

How many benchmarks do Gemini 3.6 Flash and Grok 4 Fast share?

23 benchmarks have published results for both models. Gemini 3.6 Flash has 46 scored results on Noometry and Grok 4 Fast has 30.

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