Noometry

Model comparison

Claude Opus 4.1 vs Yi-1.5-34B

Claude Opus 4.1 is the stronger model overall, scoring 40.8 to 30.2 on the Noometry Index.

Last verified . 18 shared benchmarks.

Claude Opus 4.1 Anthropic

40.8

Rank #136 Confirmed

Yi-1.5-34B 01.AI

30.2

Rank #286 Confirmed

Summary

  • They share 18 benchmarks with published results for both. Claude Opus 4.1 scores higher in 7 categories and Yi-1.5-34B in 1 category; 8 gaps are clear of the uncertainty.
  • The widest gap is in knowledge, where Claude Opus 4.1 leads 41.9 to 14.8.
  • The biggest single-benchmark swing is GPQA Diamond: 77.3% for Claude Opus 4.1 and 32% for Yi-1.5-34B.
  • Yi-1.5-34B has downloadable open weights; the other is API-only.

Side by side

Claude Opus 4.1Yi-1.5-34B
ProviderAnthropic01.AI
Noometry Index40.830.2
Released2025-08-052024-05-13
WeightsProprietaryOpen
Context window200K—
Max output32K—
Input $ / M tokens$15—
Output $ / M tokens$75—
Results tracked4821

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Category by category

Coding Claude Opus 4.1 leads

Claude Opus 4.1: 44.3 (#69), Yi-1.5-34B: 31.9 (#267)

BenchmarkClaude Opus 4.1Yi-1.5-34B
LMArena Coding14791169
SWE-bench Verified73.3%—
LMArena WebDev1390—
WeirdML45.9%—
BigCodeBench Instruct—33.9%
BigCodeBench Complete—43.8%
ALE-Bench674.77—
AlgoTune1.34—

Agentic & Tool Use Not comparable

Claude Opus 4.1: 34.8 (#38), Yi-1.5-34B: —

BenchmarkClaude Opus 4.1Yi-1.5-34B
Terminal-Bench38%—
GDPval43.6%—
Cybench42%—
DeepResearch Bench48.3%—
LMArena Search1148—
METR Time Horizons66.8%—

Reasoning Claude Opus 4.1 leads

Claude Opus 4.1: 31.6 (#70), Yi-1.5-34B: 21.5 (#195)

BenchmarkClaude Opus 4.1Yi-1.5-34B
LMArena Hard Prompts14431160
SimpleBench60%—
Chess Puzzles7%—
EnigmaEval7.2%—
EBR-Bench7.9%—
Mystery Game Puzzles21%—
DTBench80%—
LMCA37.1%—
Epoch Capabilities Index144.11—
ForecastBench62—

Math Yi-1.5-34B leads

Claude Opus 4.1: 22.0 (#267), Yi-1.5-34B: 25.3 (#248)

BenchmarkClaude Opus 4.1Yi-1.5-34B
LMArena Math14301182
FrontierMath (Tiers 1-3)12.6%—
FrontierMath Tier 42.4%—
OTIS Mock AIME 2024-202568.9%—
MATH Level 5—25.5%
FrontierMath (Feb 2025 set)7.2%—
FrontierMath Tier 4 (v1)4.2%—

Knowledge Claude Opus 4.1 leads

Claude Opus 4.1: 41.9 (#93), Yi-1.5-34B: 14.8 (#290)

BenchmarkClaude Opus 4.1Yi-1.5-34B
GPQA Diamond77.3%32%
LMArena Expert14391144
Humanity's Last Exam11.5%—
Confabulations17.1%—
Vectara Hallucination Rate11.8%—

Multimodal Not comparable

Claude Opus 4.1: 26.2 (#114), Yi-1.5-34B: —

BenchmarkClaude Opus 4.1Yi-1.5-34B
VPCT35%—

Multilingual Claude Opus 4.1 leads

Claude Opus 4.1: 52.1 (#90), Yi-1.5-34B: 32.5 (#251)

BenchmarkClaude Opus 4.1Yi-1.5-34B
LMArena Non-English14051121
LMArena Chinese14271213
LMArena French14321155
LMArena German14121111
LMArena Japanese13781021
LMArena Korean13811005
LMArena Russian14211091
LMArena Spanish14481120

Instruction Following Claude Opus 4.1 leads

Claude Opus 4.1: 75.8 (#53), Yi-1.5-34B: 59.4 (#252)

BenchmarkClaude Opus 4.1Yi-1.5-34B
LMArena Instruction Following14361139

Long Context Claude Opus 4.1 leads

Claude Opus 4.1: 44.5 (#60), Yi-1.5-34B: 34.6 (#243)

BenchmarkClaude Opus 4.1Yi-1.5-34B
LMArena Longer Query14551144

Writing & Preference Claude Opus 4.1 leads

Claude Opus 4.1: 62.6 (#70), Yi-1.5-34B: 37.6 (#252)

BenchmarkClaude Opus 4.1Yi-1.5-34B
LMArena Text14191173
LMArena Creative Writing14121135
LMArena Multi-Turn14441153
Short-Story Creative Writing84.7%—

Frequently asked questions

Is Claude Opus 4.1 better than Yi-1.5-34B?

Claude Opus 4.1 is the stronger model overall, scoring 40.8 to 30.2 on the Noometry Index.

Is Claude Opus 4.1 or Yi-1.5-34B better for coding?

Claude Opus 4.1 scores higher on coding benchmarks: 44.3 versus 31.9 in the Noometry coding category.

How many benchmarks do Claude Opus 4.1 and Yi-1.5-34B share?

18 benchmarks have published results for both models. Claude Opus 4.1 has 48 scored results on Noometry and Yi-1.5-34B has 21.

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