Noometry

Model comparison

Grok 4.6 vs Longcat Flash Chat

Grok 4.6 is the stronger model overall, scoring 56.9 to 42.1 on the Noometry Index.

Last verified . 18 shared benchmarks.

Grok 4.6 xAI

56.9

Rank #21 Confirmed

Longcat Flash Chat Meituan

42.1

Rank #120 Confirmed

Summary

  • They share 18 benchmarks with published results for both. Grok 4.6 scores higher in 8 categories and Longcat Flash Chat in 0 categories; 6 gaps are clear of the uncertainty.
  • The widest gap is in reasoning, where Grok 4.6 leads 61.4 to 19.0.
  • The biggest single-benchmark swing is NYT Connections (extended): 80% for Grok 4.6 and 17.7% for Longcat Flash Chat.
  • Longcat Flash Chat has downloadable open weights; the other is API-only.

Side by side

Grok 4.6Longcat Flash Chat
ProviderxAIMeituan
Noometry Index56.942.1
Released2026-08-12—
WeightsProprietaryOpen
Context window500K—
Max output500K—
Input $ / M tokens$2—
Output $ / M tokens$6—
Results tracked4919

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Category by category

Coding Grok 4.6 leads

Grok 4.6: 58.5 (#16), Longcat Flash Chat: 43.5 (#87)

BenchmarkGrok 4.6Longcat Flash Chat
LMArena Coding14651471
DeepSWE67.5%—
FrontierCode48%—
CursorBench41.4%—
LMArena WebDev1617—
FrontierSWE25.3%—
SciCode56.5%—
WeirdML67.3%—
ALE-Bench1,508—

Agentic & Tool Use Not comparable

Grok 4.6: 39.4 (#27), Longcat Flash Chat: —

BenchmarkGrok 4.6Longcat Flash Chat
APEX-Agents65.3%—
GDP.pdf17.2%—
Vending-Bench 29,047—

Reasoning Grok 4.6 leads

Grok 4.6: 61.4 (#20), Longcat Flash Chat: 19.0 (#272)

BenchmarkGrok 4.6Longcat Flash Chat
NYT Connections (extended)80%17.7%
LMArena Hard Prompts14471440
ARC-AGI-267.1%—
SimpleBench75.9%—
Kagi LLM Benchmark—43.9%
ARC-AGI-187.5%—
CritPt19.7%—
Chess Puzzles40%—
EBR-Bench30.5%—
Mystery Game Puzzles34%—
DTBench97.3%—
LMCA48.5%—
Epoch Capabilities Index156.44—

Math Grok 4.6 leads

Grok 4.6: 67.0 (#24), Longcat Flash Chat: 39.4 (#107)

BenchmarkGrok 4.6Longcat Flash Chat
LMArena Math14231442
FrontierMath (Tiers 1-3)66%—
FrontierMath Tier 431.7%—
OTIS Mock AIME 2024-202599.2%—
ProofBench51%—

Knowledge Grok 4.6 leads

Grok 4.6: 63.3 (#20), Longcat Flash Chat: 40.6 (#116)

BenchmarkGrok 4.6Longcat Flash Chat
LMArena Expert14671454
GPQA Diamond94%—
SimpleQA Verified49.3%—

Multimodal Not comparable

Grok 4.6: 43.6 (#23), Longcat Flash Chat: —

BenchmarkGrok 4.6Longcat Flash Chat
LMArena Vision1263—
Blueprint-Bench 233.2%—
Furniture Assembly40%—
LMArena Document1452—

Multilingual Grok 4.6 leads

Grok 4.6: 53.0 (#74), Longcat Flash Chat: 51.9 (#101)

BenchmarkGrok 4.6Longcat Flash Chat
LMArena Non-English14201404
LMArena Chinese14801465
LMArena French14611456
LMArena German14311408
LMArena Japanese13761373
LMArena Korean13971371
LMArena Russian14221395
LMArena Spanish14041445

Instruction Following Too close to call

Grok 4.6: 75.4 (#63), Longcat Flash Chat: 74.4 (#96)

BenchmarkGrok 4.6Longcat Flash Chat
LMArena Instruction Following14311411

Long Context Too close to call

Grok 4.6: 44.5 (#66), Longcat Flash Chat: 43.5 (#93)

BenchmarkGrok 4.6Longcat Flash Chat
LMArena Longer Query14541425

Writing & Preference Grok 4.6 leads

Grok 4.6: 62.3 (#80), Longcat Flash Chat: 61.0 (#91)

BenchmarkGrok 4.6Longcat Flash Chat
LMArena Text14281427
LMArena Creative Writing14281388
LMArena Multi-Turn14251418

Frequently asked questions

Is Grok 4.6 better than Longcat Flash Chat?

Grok 4.6 is the stronger model overall, scoring 56.9 to 42.1 on the Noometry Index.

Is Grok 4.6 or Longcat Flash Chat better for coding?

Grok 4.6 scores higher on coding benchmarks: 58.5 versus 43.5 in the Noometry coding category.

How many benchmarks do Grok 4.6 and Longcat Flash Chat share?

18 benchmarks have published results for both models. Grok 4.6 has 49 scored results on Noometry and Longcat Flash Chat has 19.

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