Noometry

Model comparison

Grok 4 vs Yi-Lightning

Grok 4 is the stronger model overall, scoring 48.1 to 37.1 on the Noometry Index.

Last verified . 18 shared benchmarks.

Grok 4 xAI

48.1

Rank #56 Confirmed

Yi-Lightning 01.AI

37.1

Rank #209 Confirmed

Summary

  • They share 18 benchmarks with published results for both. Grok 4 scores higher in 8 categories and Yi-Lightning in 0 categories; 8 gaps are clear of the uncertainty.
  • The widest gap is in long context, where Grok 4 leads 63.1 to 39.4.
  • The biggest single-benchmark swing is Aider Polyglot: 79.6% for Grok 4 and 12.9% for Yi-Lightning.

Side by side

Grok 4Yi-Lightning
ProviderxAI01.AI
Noometry Index48.137.1
Released2025-07-092024-12-02
WeightsProprietaryProprietary
Context window——
Max output——
Input $ / M tokens——
Output $ / M tokens——
Results tracked4818

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Category by category

Coding Grok 4 leads

Grok 4: 50.3 (#46), Yi-Lightning: 27.4 (#320)

BenchmarkGrok 4Yi-Lightning
Aider Polyglot79.6%12.9%
LMArena Coding14081312
WeirdML45.7%—

Agentic & Tool Use Not comparable

Grok 4: 32.3 (#68), Yi-Lightning: —

BenchmarkGrok 4Yi-Lightning
Terminal-Bench27.2%—
Berkeley Function Calling Leaderboard63%—
GDPval21.1%—
Cybench43%—
DeepResearch Bench47.3%—
BALROG43.6%—
LMArena Search1142—
METR Time Horizons66.6%—

Reasoning Grok 4 leads

Grok 4: 36.7 (#65), Yi-Lightning: 25.9 (#139)

BenchmarkGrok 4Yi-Lightning
LMArena Hard Prompts14091302
ARC-AGI-216%—
SimpleBench60.5%—
Kagi LLM Benchmark73.6%—
ARC-AGI-166.7%—
Chess Puzzles28%—
Epoch Capabilities Index146.44—
ForecastBench60.9—

Math Grok 4 leads

Grok 4: 48.4 (#64), Yi-Lightning: 36.2 (#172)

BenchmarkGrok 4Yi-Lightning
LMArena Math14221300
OTIS Mock AIME 2024-202584%—
Omni-MATH60.3%—
FrontierMath (Feb 2025 set)19.7%—
FrontierMath Tier 4 (v1)2.1%—

Knowledge Grok 4 leads

Grok 4: 53.8 (#55), Yi-Lightning: 35.4 (#185)

BenchmarkGrok 4Yi-Lightning
LMArena Expert14151286
GPQA Diamond87%—
MMLU-Pro85.1%—
Confabulations12.4%—
GPQA (HELM)72.7%—

Multimodal Not comparable

Grok 4: 33.7 (#94), Yi-Lightning: —

BenchmarkGrok 4Yi-Lightning
LMArena Vision1210—
GeoBench45%—

Multilingual Grok 4 leads

Grok 4: 51.8 (#103), Yi-Lightning: 42.2 (#196)

BenchmarkGrok 4Yi-Lightning
LMArena Non-English14031269
LMArena Chinese14271320
LMArena French14181305
LMArena German14291267
LMArena Japanese13941228
LMArena Korean13771192
LMArena Russian14101255
LMArena Spanish14201315

Instruction Following Grok 4 leads

Grok 4: 79.2 (#5), Yi-Lightning: 67.4 (#196)

BenchmarkGrok 4Yi-Lightning
LMArena Instruction Following13871278
IFEval94.9%—

Long Context Grok 4 leads

Grok 4: 63.1 (#4), Yi-Lightning: 39.4 (#181)

BenchmarkGrok 4Yi-Lightning
LMArena Longer Query14091297
Fiction.LiveBench94.4%—

Writing & Preference Grok 4 leads

Grok 4: 58.5 (#116), Yi-Lightning: 50.2 (#184)

BenchmarkGrok 4Yi-Lightning
LMArena Text14111302
LMArena Creative Writing13971280
LMArena Multi-Turn14161311
Short-Story Creative Writing76.9%—
WildBench79.7%—

Frequently asked questions

Is Grok 4 better than Yi-Lightning?

Grok 4 is the stronger model overall, scoring 48.1 to 37.1 on the Noometry Index.

Is Grok 4 or Yi-Lightning better for coding?

Grok 4 scores higher on coding benchmarks: 50.3 versus 27.4 in the Noometry coding category.

How many benchmarks do Grok 4 and Yi-Lightning share?

18 benchmarks have published results for both models. Grok 4 has 48 scored results on Noometry and Yi-Lightning has 18.

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