Noometry

Model comparison

Kimi K2.6 vs Yi-Lightning

Kimi K2.6 is the stronger model overall, scoring 47.7 to 37.1 on the Noometry Index.

Last verified . 17 shared benchmarks.

Kimi K2.6 Moonshot AI

47.7

Rank #60 Confirmed

Yi-Lightning 01.AI

37.1

Rank #209 Confirmed

Summary

  • They share 17 benchmarks with published results for both. Kimi K2.6 scores higher in 8 categories and Yi-Lightning in 0 categories; 8 gaps are clear of the uncertainty.
  • The widest gap is in coding, where Kimi K2.6 leads 50.7 to 27.4.
  • Kimi K2.6 has downloadable open weights; the other is API-only.

Side by side

Kimi K2.6Yi-Lightning
ProviderMoonshot AI01.AI
Noometry Index47.737.1
Released2026-04-202024-12-02
WeightsOpenProprietary
Context window262K—
Max output262K—
Input $ / M tokens$0.95—
Output $ / M tokens$4—
Results tracked5118

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Category by category

Coding Kimi K2.6 leads

Kimi K2.6: 50.7 (#43), Yi-Lightning: 27.4 (#320)

BenchmarkKimi K2.6Yi-Lightning
LMArena Coding14881312
SWE-bench Verified76.7%—
Aider Polyglot—12.9%
LMArena WebDev1509—
SciCode53.5%—
WeirdML55.9%—
ALE-Bench1,093—

Agentic & Tool Use Not comparable

Kimi K2.6: 21.9 (#137), Yi-Lightning: —

BenchmarkKimi K2.6Yi-Lightning
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), Yi-Lightning: 25.9 (#139)

BenchmarkKimi K2.6Yi-Lightning
LMArena Hard Prompts14701302
NYT Connections (extended)87.2%—
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), Yi-Lightning: 36.2 (#172)

BenchmarkKimi K2.6Yi-Lightning
LMArena Math14751300
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), Yi-Lightning: 35.4 (#185)

BenchmarkKimi K2.6Yi-Lightning
LMArena Expert14911286
GPQA Diamond90.8%—
SimpleQA Verified34.9%—
Vectara Hallucination Rate10.8%—

Multimodal Not comparable

Kimi K2.6: 31.6 (#103), Yi-Lightning: —

BenchmarkKimi K2.6Yi-Lightning
LMArena Vision1283—
Blueprint-Bench 23.9%—
Furniture Assembly21.7%—
LMArena Document1451—

Multilingual Kimi K2.6 leads

Kimi K2.6: 54.9 (#37), Yi-Lightning: 42.2 (#196)

BenchmarkKimi K2.6Yi-Lightning
LMArena Non-English14461269
LMArena Chinese15211320
LMArena French14711305
LMArena German14501267
LMArena Japanese14431228
LMArena Korean14271192
LMArena Russian14461255
LMArena Spanish14641315

Instruction Following Kimi K2.6 leads

Kimi K2.6: 76.3 (#43), Yi-Lightning: 67.4 (#196)

BenchmarkKimi K2.6Yi-Lightning
LMArena Instruction Following14511278

Long Context Kimi K2.6 leads

Kimi K2.6: 44.9 (#52), Yi-Lightning: 39.4 (#181)

BenchmarkKimi K2.6Yi-Lightning
LMArena Longer Query14681297

Writing & Preference Kimi K2.6 leads

Kimi K2.6: 68.5 (#26), Yi-Lightning: 50.2 (#184)

BenchmarkKimi K2.6Yi-Lightning
LMArena Text14551302
LMArena Creative Writing14341280
LMArena Multi-Turn14531311
EQ-Bench Creative Writing1725—
EQ-Bench 41202—

Frequently asked questions

Is Kimi K2.6 better than Yi-Lightning?

Kimi K2.6 is the stronger model overall, scoring 47.7 to 37.1 on the Noometry Index.

Is Kimi K2.6 or Yi-Lightning better for coding?

Kimi K2.6 scores higher on coding benchmarks: 50.7 versus 27.4 in the Noometry coding category.

How many benchmarks do Kimi K2.6 and Yi-Lightning share?

17 benchmarks have published results for both models. Kimi K2.6 has 51 scored results on Noometry and Yi-Lightning has 18.

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