Noometry

Model comparison

Kimi K2.6 vs Longcat Flash Chat

Kimi K2.6 is the stronger model overall, scoring 47.7 to 42.1 on the Noometry Index.

Last verified . 18 shared benchmarks.

Kimi K2.6 Moonshot AI

47.7

Rank #60 Confirmed

Longcat Flash Chat Meituan

42.1

Rank #120 Confirmed

Summary

  • They share 18 benchmarks with published results for both. Kimi K2.6 scores higher in 8 categories and Longcat Flash Chat in 0 categories; 8 gaps are clear of the uncertainty.
  • The widest gap is in reasoning, where Kimi K2.6 leads 40.5 to 19.0.
  • The biggest single-benchmark swing is NYT Connections (extended): 87.2% for Kimi K2.6 and 17.7% for Longcat Flash Chat.

Side by side

Kimi K2.6Longcat Flash Chat
ProviderMoonshot AIMeituan
Noometry Index47.742.1
Released2026-04-20—
WeightsOpenOpen
Context window262K—
Max output262K—
Input $ / M tokens$0.95—
Output $ / M tokens$4—
Results tracked5119

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Category by category

Coding Kimi K2.6 leads

Kimi K2.6: 50.7 (#43), Longcat Flash Chat: 43.5 (#87)

BenchmarkKimi K2.6Longcat Flash Chat
LMArena Coding14881471
SWE-bench Verified76.7%—
LMArena WebDev1509—
SciCode53.5%—
WeirdML55.9%—
ALE-Bench1,093—

Agentic & Tool Use Not comparable

Kimi K2.6: 21.9 (#137), Longcat Flash Chat: —

BenchmarkKimi K2.6Longcat Flash Chat
OSWorld 2.04.6%—
ExploitBench18.4%—
GBAEval0.9%—
GDP.pdf12%—
Vending-Bench 26,205—

Reasoning Kimi K2.6 leads

Kimi K2.6: 40.5 (#55), Longcat Flash Chat: 19.0 (#272)

BenchmarkKimi K2.6Longcat Flash Chat
NYT Connections (extended)87.2%17.7%
LMArena Hard Prompts14701440
Kagi LLM Benchmark—43.9%
CritPt8%—
Chess Puzzles26%—
EBR-Bench2.4%—
Mystery Game Puzzles18%—
DTBench90.9%—
LMCA37.3%—
Epoch Capabilities Index151.05—

Math Kimi K2.6 leads

Kimi K2.6: 57.0 (#41), Longcat Flash Chat: 39.4 (#107)

BenchmarkKimi K2.6Longcat Flash Chat
LMArena Math14751442
FrontierMath (Tiers 1-3)57.2%—
FrontierMath Tier 425.6%—
MathArena Final-Answer Competitions72.9%—
OTIS Mock AIME 2024-202596.1%—
ProofBench16%—
FrontierMath (Feb 2025 set)39%—
FrontierMath Tier 4 (v1)14.6%—

Knowledge Kimi K2.6 leads

Kimi K2.6: 54.0 (#54), Longcat Flash Chat: 40.6 (#116)

BenchmarkKimi K2.6Longcat Flash Chat
LMArena Expert14911454
GPQA Diamond90.8%—
SimpleQA Verified34.9%—
Vectara Hallucination Rate10.8%—

Multimodal Not comparable

Kimi K2.6: 31.6 (#103), Longcat Flash Chat: —

BenchmarkKimi K2.6Longcat Flash Chat
LMArena Vision1283—
Blueprint-Bench 23.9%—
Furniture Assembly21.7%—
LMArena Document1451—

Multilingual Kimi K2.6 leads

Kimi K2.6: 54.9 (#37), Longcat Flash Chat: 51.9 (#101)

BenchmarkKimi K2.6Longcat Flash Chat
LMArena Non-English14461404
LMArena Chinese15211465
LMArena French14711456
LMArena German14501408
LMArena Japanese14431373
LMArena Korean14271371
LMArena Russian14461395
LMArena Spanish14641445

Instruction Following Kimi K2.6 leads

Kimi K2.6: 76.3 (#43), Longcat Flash Chat: 74.4 (#96)

BenchmarkKimi K2.6Longcat Flash Chat
LMArena Instruction Following14511411

Long Context Kimi K2.6 leads

Kimi K2.6: 44.9 (#52), Longcat Flash Chat: 43.5 (#93)

BenchmarkKimi K2.6Longcat Flash Chat
LMArena Longer Query14681425

Writing & Preference Kimi K2.6 leads

Kimi K2.6: 68.5 (#26), Longcat Flash Chat: 61.0 (#91)

BenchmarkKimi K2.6Longcat Flash Chat
LMArena Text14551427
LMArena Creative Writing14341388
LMArena Multi-Turn14531418
EQ-Bench Creative Writing1725—
EQ-Bench 41202—

Frequently asked questions

Is Kimi K2.6 better than Longcat Flash Chat?

Kimi K2.6 is the stronger model overall, scoring 47.7 to 42.1 on the Noometry Index.

Is Kimi K2.6 or Longcat Flash Chat better for coding?

Kimi K2.6 scores higher on coding benchmarks: 50.7 versus 43.5 in the Noometry coding category.

How many benchmarks do Kimi K2.6 and Longcat Flash Chat share?

18 benchmarks have published results for both models. Kimi K2.6 has 51 scored results on Noometry and Longcat Flash Chat has 19.

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