Noometry

Model comparison

Claude Fable 5.1 vs Yi-1.5-34B

Claude Fable 5.1 is the stronger model overall, scoring 69.0 to 30.6 on the Noometry Index.

Last verified . 17 shared benchmarks.

Claude Fable 5.1 Anthropic

69.0

Rank #2 Confirmed

Yi-1.5-34B 01.AI

30.6

Rank #289 Confirmed

Summary

  • They share 17 benchmarks with published results for both. Claude Fable 5.1 scores higher in 8 categories and Yi-1.5-34B in 0 categories; 8 gaps are clear of the uncertainty.
  • The widest gap is in math, where Claude Fable 5.1 leads 89.6 to 27.5.
  • Yi-1.5-34B has downloadable open weights; the other is API-only.

Side by side

Claude Fable 5.1Yi-1.5-34B
ProviderAnthropic01.AI
Noometry Index69.030.6
Released2026-09-012024-05-13
WeightsProprietaryOpen
Context window1M—
Max output128K—
Input $ / M tokens$10—
Output $ / M tokens$50—
Results tracked5221

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Category by category

Coding Claude Fable 5.1 leads

Claude Fable 5.1: 74.7 (#1), Yi-1.5-34B: 32.4 (#272)

BenchmarkClaude Fable 5.1Yi-1.5-34B
LMArena Coding15281169
FrontierCode50.9%—
CursorBench51.8%—
LMArena WebDev1744—
FrontierSWE56.3%—
SciCode63.1%—
GSO88.2%—
WeirdML92.9%—
BigCodeBench Instruct—33.9%
MirrorCode73.3%—
BigCodeBench Complete—43.8%
ALE-Bench2,143—

Agentic & Tool Use Not comparable

Claude Fable 5.1: 50.7 (#5), Yi-1.5-34B: —

BenchmarkClaude Fable 5.1Yi-1.5-34B
APEX-Agents68.6%—
Remote Labor Index17.9%—
GDP.pdf29.6%—
Vending-Bench 25,422—

Reasoning Claude Fable 5.1 leads

Claude Fable 5.1: 76.7 (#7), Yi-1.5-34B: 22.5 (#191)

BenchmarkClaude Fable 5.1Yi-1.5-34B
LMArena Hard Prompts15261160
ARC-AGI-290%—
NYT Connections (extended)90%—
ARC-AGI-197.5%—
CritPt31.1%—
Chess Puzzles47%—
EBR-Bench57.1%—
Mystery Game Puzzles58%—
DTBench97.6%—
LMCA65.5%—
Epoch Capabilities Index164.7—

Math Claude Fable 5.1 leads

Claude Fable 5.1: 89.6 (#4), Yi-1.5-34B: 27.5 (#249)

BenchmarkClaude Fable 5.1Yi-1.5-34B
LMArena Math15251182
FrontierMath (Tiers 1-3)90.2%—
FrontierMath Tier 487.8%—
OTIS Mock AIME 2024-2025100%—
ProofBench100%—
MATH Level 5—25.5%
FrontierMath Erdős0%—

Knowledge Claude Fable 5.1 leads

Claude Fable 5.1: 69.6 (#6), Yi-1.5-34B: 14.8 (#295)

BenchmarkClaude Fable 5.1Yi-1.5-34B
LMArena Expert15351144
GPQA Diamond—32%
Humanity's Last Exam46.5%—
SimpleQA Verified70.8%—

Multimodal Not comparable

Claude Fable 5.1: 53.9 (#4), Yi-1.5-34B: —

BenchmarkClaude Fable 5.1Yi-1.5-34B
LMArena Vision1318—
Blueprint-Bench 241.9%—
Furniture Assembly70%—
LMArena Document1513—

Multilingual Claude Fable 5.1 leads

Claude Fable 5.1: 59.1 (#3), Yi-1.5-34B: 32.3 (#256)

BenchmarkClaude Fable 5.1Yi-1.5-34B
LMArena Non-English15071121
LMArena Chinese15861213
LMArena French15251156
LMArena German15001111
LMArena Japanese15431021
LMArena Korean15341005
LMArena Russian15211091
LMArena Spanish15161121

Instruction Following Claude Fable 5.1 leads

Claude Fable 5.1: 79.2 (#6), Yi-1.5-34B: 59.2 (#257)

BenchmarkClaude Fable 5.1Yi-1.5-34B
LMArena Instruction Following15171139

Long Context Claude Fable 5.1 leads

Claude Fable 5.1: 46.7 (#20), Yi-1.5-34B: 34.6 (#248)

BenchmarkClaude Fable 5.1Yi-1.5-34B
LMArena Longer Query15221143

Writing & Preference Claude Fable 5.1 leads

Claude Fable 5.1: 79.2 (#2), Yi-1.5-34B: 37.4 (#257)

BenchmarkClaude Fable 5.1Yi-1.5-34B
LMArena Text15101173
LMArena Creative Writing15071135
LMArena Multi-Turn14921153
EQ-Bench Creative Writing2162—

Frequently asked questions

Is Claude Fable 5.1 better than Yi-1.5-34B?

Claude Fable 5.1 is the stronger model overall, scoring 69.0 to 30.6 on the Noometry Index.

Is Claude Fable 5.1 or Yi-1.5-34B better for coding?

Claude Fable 5.1 scores higher on coding benchmarks: 74.7 versus 32.4 in the Noometry coding category.

How many benchmarks do Claude Fable 5.1 and Yi-1.5-34B share?

17 benchmarks have published results for both models. Claude Fable 5.1 has 52 scored results on Noometry and Yi-1.5-34B has 21.

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