Noometry

Model comparison

Claude Opus 4.8 vs Yi-34B

Claude Opus 4.8 is the stronger model overall, scoring 60.7 to 27.4 on the Noometry Index.

Last verified . 19 shared benchmarks.

Claude Opus 4.8 Anthropic

60.7

Rank #9 Confirmed

Yi-34B 01.AI

27.4

Rank #325 Confirmed

Summary

  • They share 19 benchmarks with published results for both. Claude Opus 4.8 scores higher in 8 categories and Yi-34B in 0 categories; 8 gaps are clear of the uncertainty.
  • The widest gap is in math, where Claude Opus 4.8 leads 78.2 to 19.8.
  • The biggest single-benchmark swing is GPQA Diamond: 91% for Claude Opus 4.8 and 14.7% for Yi-34B.
  • Yi-34B has downloadable open weights; the other is API-only.

Side by side

Claude Opus 4.8Yi-34B
ProviderAnthropic01.AI
Noometry Index60.727.4
Released2026-05-282023-11-02
WeightsProprietaryOpen
Context window1M—
Max output128K—
Input $ / M tokens$5—
Output $ / M tokens$25—
Results tracked6523

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Category by category

Coding Claude Opus 4.8 leads

Claude Opus 4.8: 60.2 (#9), Yi-34B: 31.8 (#269)

BenchmarkClaude Opus 4.8Yi-34B
LMArena Coding14911112
DeepSWE59%—
FrontierCode46.5%—
LMArena WebDev1556—
SciCode53.5%—
GSO47.1%—
WeirdML82.9%—
ALE-Bench1,564—

Agentic & Tool Use Not comparable

Claude Opus 4.8: 47.6 (#10), Yi-34B: —

BenchmarkClaude Opus 4.8Yi-34B
APEX-Agents48.9%—
OSWorld 2.020.6%—
Remote Labor Index8.3%—
τ²-bench Banking39.7%—
DeepResearch Bench50.2%—
PostTrainBench33.8%—
GBAEval70.9%—
GDP.pdf24%—
LMArena Search1204—
Vending-Bench 25,787—

Reasoning Claude Opus 4.8 leads

Claude Opus 4.8: 64.6 (#14), Yi-34B: 20.3 (#222)

BenchmarkClaude Opus 4.8Yi-34B
LMArena Hard Prompts14811104
Epoch Capabilities Index158.3117.28
ARC-AGI-272.1%—
SimpleBench64.8%—
Kagi LLM Benchmark88.8%—
NYT Connections (extended)91.1%—
ARC-AGI-192.5%—
CritPt20.9%—
Chess Puzzles34%—
EnigmaEval23.5%—
EBR-Bench28.6%—
Mystery Game Puzzles36%—
DTBench94.9%—
LMCA57.5%—
Surface Evolver Bench87.5%—
Bench to the Future 30.14—
BIG-Bench Hard—71.7%
ForecastBench59.9—

Math Claude Opus 4.8 leads

Claude Opus 4.8: 78.2 (#11), Yi-34B: 19.8 (#277)

BenchmarkClaude Opus 4.8Yi-34B
LMArena Math14871114
FrontierMath (Tiers 1-3)80%—
FrontierMath Tier 456.1%—
MathArena Final-Answer Competitions91.8%—
OTIS Mock AIME 2024-202598.3%—
ProofBench69%—
MATH Level 5—5.1%
FrontierMath (Feb 2025 set)47.2%—
FrontierMath Tier 4 (v1)31.3%—
GSM8K—76%

Knowledge Claude Opus 4.8 leads

Claude Opus 4.8: 61.3 (#26), Yi-34B: 7.5 (#304)

BenchmarkClaude Opus 4.8Yi-34B
GPQA Diamond91%14.7%
LMArena Expert15011061
SimpleQA Verified53%—
MMLU—76.3%

Multimodal Not comparable

Claude Opus 4.8: 43.2 (#20), Yi-34B: —

BenchmarkClaude Opus 4.8Yi-34B
LMArena Vision1295—
Blueprint-Bench 214.5%—
Furniture Assembly42.5%—
LMArena Document1475—

Multilingual Claude Opus 4.8 leads

Claude Opus 4.8: 55.4 (#31), Yi-34B: 29.9 (#259)

BenchmarkClaude Opus 4.8Yi-34B
LMArena Non-English14501079
LMArena Chinese15091175
LMArena French14821080
LMArena German14701042
LMArena Japanese1440993
LMArena Korean1432959
LMArena Russian14761050
LMArena Spanish14701070

Instruction Following Claude Opus 4.8 leads

Claude Opus 4.8: 77.6 (#22), Yi-34B: 56.4 (#269)

BenchmarkClaude Opus 4.8Yi-34B
LMArena Instruction Following14761091

Long Context Claude Opus 4.8 leads

Claude Opus 4.8: 45.4 (#37), Yi-34B: 33.2 (#259)

BenchmarkClaude Opus 4.8Yi-34B
LMArena Longer Query14821094

Writing & Preference Claude Opus 4.8 leads

Claude Opus 4.8: 72.1 (#17), Yi-34B: 34.3 (#268)

BenchmarkClaude Opus 4.8Yi-34B
LMArena Text14601129
LMArena Creative Writing14531108
LMArena Multi-Turn14761113
EQ-Bench Creative Writing1840—
EQ-Bench 41281—

Frequently asked questions

Is Claude Opus 4.8 better than Yi-34B?

Claude Opus 4.8 is the stronger model overall, scoring 60.7 to 27.4 on the Noometry Index.

Is Claude Opus 4.8 or Yi-34B better for coding?

Claude Opus 4.8 scores higher on coding benchmarks: 60.2 versus 31.8 in the Noometry coding category.

How many benchmarks do Claude Opus 4.8 and Yi-34B share?

19 benchmarks have published results for both models. Claude Opus 4.8 has 65 scored results on Noometry and Yi-34B has 23.

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