Noometry

Model comparison

Claude Haiku 4.5 vs Yi-Lightning

Claude Haiku 4.5 is the stronger model overall, scoring 39.5 to 37.1 on the Noometry Index.

Last verified . 17 shared benchmarks.

Claude Haiku 4.5 Anthropic

39.5

Rank #165 Confirmed

Yi-Lightning 01.AI

37.1

Rank #209 Confirmed

Summary

  • They share 17 benchmarks with published results for both. Claude Haiku 4.5 scores higher in 7 categories and Yi-Lightning in 1 category; 8 gaps are clear of the uncertainty.
  • The widest gap is in coding, where Claude Haiku 4.5 leads 44.0 to 27.4.

Side by side

Claude Haiku 4.5Yi-Lightning
ProviderAnthropic01.AI
Noometry Index39.537.1
Released2025-10-152024-12-02
WeightsProprietaryProprietary
Context window200K—
Max output64K—
Input $ / M tokens$1—
Output $ / M tokens$5—
Results tracked5318

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Category by category

Coding Claude Haiku 4.5 leads

Claude Haiku 4.5: 44.0 (#78), Yi-Lightning: 27.4 (#320)

BenchmarkClaude Haiku 4.5Yi-Lightning
LMArena Coding14531312
SWE-bench Verified (bash only)66.6%—
Aider Polyglot—12.9%
LMArena WebDev1330—
SWE-bench Multilingual64.7%—
SciCode43.3%—
WeirdML45.4%—
ALE-Bench653.48—

Agentic & Tool Use Not comparable

Claude Haiku 4.5: 33.6 (#52), Yi-Lightning: —

BenchmarkClaude Haiku 4.5Yi-Lightning
Terminal-Bench35.5%—
Berkeley Function Calling Leaderboard68.7%—
DeepResearch Bench45.5%—
BALROG31.2%—
ExploitBench13.7%—
Vending-Bench 2458.89—

Reasoning Yi-Lightning leads

Claude Haiku 4.5: 15.1 (#320), Yi-Lightning: 25.9 (#139)

BenchmarkClaude Haiku 4.5Yi-Lightning
LMArena Hard Prompts14201302
ARC-AGI-24%—
NYT Connections (extended)14.3%—
ARC-AGI-147.7%—
CritPt0%—
Chess Puzzles8%—
DTBench73.6%—
LMCA30.9%—
Epoch Capabilities Index142.41—
ForecastBench61.4—

Math Claude Haiku 4.5 leads

Claude Haiku 4.5: 44.9 (#78), Yi-Lightning: 36.2 (#172)

BenchmarkClaude Haiku 4.5Yi-Lightning
LMArena Math13961300
OTIS Mock AIME 2024-202566.7%—
Omni-MATH56.1%—
MATH Level 596.4%—
FrontierMath (Feb 2025 set)5.9%—
FrontierMath Tier 4 (v1)2.1%—

Knowledge Claude Haiku 4.5 leads

Claude Haiku 4.5: 37.7 (#153), Yi-Lightning: 35.4 (#185)

BenchmarkClaude Haiku 4.5Yi-Lightning
LMArena Expert14421286
GPQA Diamond71.2%—
SimpleQA Verified13.2%—
MMLU-Pro77.7%—
Vectara Hallucination Rate9.8%—
GPQA (HELM)60.5%—

Multimodal Not comparable

Claude Haiku 4.5: 26.8 (#118), Yi-Lightning: —

BenchmarkClaude Haiku 4.5Yi-Lightning
Blueprint-Bench 20%—
LMArena Document1420—

Multilingual Claude Haiku 4.5 leads

Claude Haiku 4.5: 49.9 (#129), Yi-Lightning: 42.2 (#196)

BenchmarkClaude Haiku 4.5Yi-Lightning
LMArena Non-English13771269
LMArena Chinese14171320
LMArena French14081305
LMArena German13751267
LMArena Japanese13391228
LMArena Korean13471192
LMArena Russian13811255
LMArena Spanish14201315

Instruction Following Claude Haiku 4.5 leads

Claude Haiku 4.5: 71.4 (#149), Yi-Lightning: 67.4 (#196)

BenchmarkClaude Haiku 4.5Yi-Lightning
LMArena Instruction Following14141278
IFEval80.1%—

Long Context Claude Haiku 4.5 leads

Claude Haiku 4.5: 43.6 (#92), Yi-Lightning: 39.4 (#181)

BenchmarkClaude Haiku 4.5Yi-Lightning
LMArena Longer Query14271297

Writing & Preference Claude Haiku 4.5 leads

Claude Haiku 4.5: 57.9 (#123), Yi-Lightning: 50.2 (#184)

BenchmarkClaude Haiku 4.5Yi-Lightning
LMArena Text13961302
LMArena Creative Writing13721280
LMArena Multi-Turn14091311
WildBench83.9%—
EQ-Bench 41064—

Frequently asked questions

Is Claude Haiku 4.5 better than Yi-Lightning?

Claude Haiku 4.5 is the stronger model overall, scoring 39.5 to 37.1 on the Noometry Index.

Is Claude Haiku 4.5 or Yi-Lightning better for coding?

Claude Haiku 4.5 scores higher on coding benchmarks: 44.0 versus 27.4 in the Noometry coding category.

How many benchmarks do Claude Haiku 4.5 and Yi-Lightning share?

17 benchmarks have published results for both models. Claude Haiku 4.5 has 53 scored results on Noometry and Yi-Lightning has 18.

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