Noometry

Model comparison

Claude Sonnet 5.5 vs Yi-1.5-34B

Claude Sonnet 5.5 is the stronger model overall, scoring 60.5 to 30.2 on the Noometry Index.

Last verified . 1 shared benchmarks.

Claude Sonnet 5.5 Anthropic

60.5

Rank #10 Confirmed

Yi-1.5-34B 01.AI

30.2

Rank #286 Confirmed

Summary

  • They share 1 benchmark with published results for both. Claude Sonnet 5.5 scores higher in 4 categories and Yi-1.5-34B in 0 categories; 4 gaps are clear of the uncertainty.
  • The widest gap is in math, where Claude Sonnet 5.5 leads 88.7 to 25.3.
  • The biggest single-benchmark swing is GPQA Diamond: 95.6% for Claude Sonnet 5.5 and 32% for Yi-1.5-34B.
  • Yi-1.5-34B has downloadable open weights; the other is API-only.

Side by side

Claude Sonnet 5.5Yi-1.5-34B
ProviderAnthropic01.AI
Noometry Index60.530.2
Released2026-09-282024-05-13
WeightsProprietaryOpen
Context window1M—
Max output128K—
Input $ / M tokens$2—
Output $ / M tokens$10—
Results tracked1621

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Category by category

Coding Claude Sonnet 5.5 leads

Claude Sonnet 5.5: 65.5 (#6), Yi-1.5-34B: 31.9 (#267)

BenchmarkClaude Sonnet 5.5Yi-1.5-34B
FrontierCode52.1%—
CursorBench55.5%—
LMArena WebDev1699—
FrontierSWE61.9%—
SciCode61%—
BigCodeBench Instruct—33.9%
LMArena Coding—1169
BigCodeBench Complete—43.8%
ALE-Bench1,819—

Agentic & Tool Use Not comparable

Claude Sonnet 5.5: 44.9 (#14), Yi-1.5-34B: —

BenchmarkClaude Sonnet 5.5Yi-1.5-34B
APEX-Agents75.5%—

Reasoning Claude Sonnet 5.5 leads

Claude Sonnet 5.5: 52.4 (#29), Yi-1.5-34B: 21.5 (#195)

BenchmarkClaude Sonnet 5.5Yi-1.5-34B
CritPt31.4%—
LMArena Hard Prompts—1160
Mystery Game Puzzles65%—

Math Claude Sonnet 5.5 leads

Claude Sonnet 5.5: 88.7 (#4), Yi-1.5-34B: 25.3 (#248)

BenchmarkClaude Sonnet 5.5Yi-1.5-34B
FrontierMath (Tiers 1-3)88.8%—
FrontierMath Tier 480.5%—
OTIS Mock AIME 2024-2025100%—
ProofBench100%—
LMArena Math—1182
MATH Level 5—25.5%

Knowledge Claude Sonnet 5.5 leads

Claude Sonnet 5.5: 66.0 (#11), Yi-1.5-34B: 14.8 (#290)

BenchmarkClaude Sonnet 5.5Yi-1.5-34B
GPQA Diamond95.6%32%
SimpleQA Verified46.5%—
LMArena Expert—1144

Multimodal Not comparable

Claude Sonnet 5.5: 53.2 (#5), Yi-1.5-34B: —

BenchmarkClaude Sonnet 5.5Yi-1.5-34B
Furniture Assembly75%—

Multilingual Not comparable

Claude Sonnet 5.5: —, Yi-1.5-34B: 32.5 (#251)

BenchmarkClaude Sonnet 5.5Yi-1.5-34B
LMArena Non-English—1121
LMArena Chinese—1213
LMArena French—1155
LMArena German—1111
LMArena Japanese—1021
LMArena Korean—1005
LMArena Russian—1091
LMArena Spanish—1120

Instruction Following Not comparable

Claude Sonnet 5.5: —, Yi-1.5-34B: 59.4 (#252)

BenchmarkClaude Sonnet 5.5Yi-1.5-34B
LMArena Instruction Following—1139

Long Context Not comparable

Claude Sonnet 5.5: —, Yi-1.5-34B: 34.6 (#243)

BenchmarkClaude Sonnet 5.5Yi-1.5-34B
LMArena Longer Query—1144

Writing & Preference Not comparable

Claude Sonnet 5.5: —, Yi-1.5-34B: 37.6 (#252)

BenchmarkClaude Sonnet 5.5Yi-1.5-34B
LMArena Text—1173
LMArena Creative Writing—1135
LMArena Multi-Turn—1153

Frequently asked questions

Is Claude Sonnet 5.5 better than Yi-1.5-34B?

Claude Sonnet 5.5 is the stronger model overall, scoring 60.5 to 30.2 on the Noometry Index.

Is Claude Sonnet 5.5 or Yi-1.5-34B better for coding?

Claude Sonnet 5.5 scores higher on coding benchmarks: 65.5 versus 31.9 in the Noometry coding category.

How many benchmarks do Claude Sonnet 5.5 and Yi-1.5-34B share?

1 benchmark has published results for both models. Claude Sonnet 5.5 has 16 scored results on Noometry and Yi-1.5-34B has 21.

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