Noometry

Model comparison

Claude Opus 5 vs ERNIE 5.1

Claude Opus 5 is the stronger model overall, scoring 67.7 to 43.1 on the Noometry Index.

Last verified . 18 shared benchmarks.

Claude Opus 5 Anthropic

67.7

Rank #4 Confirmed

ERNIE 5.1 Baidu

43.1

Rank #87 Confirmed

Summary

  • They share 18 benchmarks with published results for both. Claude Opus 5 scores higher in 8 categories and ERNIE 5.1 in 0 categories; 8 gaps are clear of the uncertainty.
  • The widest gap is in reasoning, where Claude Opus 5 leads 77.1 to 20.9.
  • The biggest single-benchmark swing is NYT Connections (extended): 94.3% for Claude Opus 5 and 23.4% for ERNIE 5.1.

Side by side

Claude Opus 5ERNIE 5.1
ProviderAnthropicBaidu
Noometry Index67.743.1
Released2026-07-24—
WeightsProprietaryProprietary
Context window1M—
Max output128K—
Input $ / M tokens$5—
Output $ / M tokens$25—
Results tracked5719

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Category by category

Coding Claude Opus 5 leads

Claude Opus 5: 67.0 (#5), ERNIE 5.1: 43.4 (#78)

BenchmarkClaude Opus 5ERNIE 5.1
LMArena Coding15331488
DeepSWE73.6%—
FrontierCode53.4%—
CursorBench46.6%—
LMArena WebDev1694—
FrontierSWE52%—
SciCode56.4%—
WeirdML91.8%—
ALE-Bench2,165—

Agentic & Tool Use Not comparable

Claude Opus 5: 55.5 (#1), ERNIE 5.1: —

BenchmarkClaude Opus 5ERNIE 5.1
APEX-Agents65.8%—
OSWorld 2.031.4%—
τ²-bench Banking48.7%—
PostTrainBench35%—
BALROG63.4%—
GBAEval79.6%—
GDP.pdf24%—
LMArena Search—1227
Vending-Bench 211,182—

Reasoning Claude Opus 5 leads

Claude Opus 5: 77.1 (#3), ERNIE 5.1: 20.9 (#209)

BenchmarkClaude Opus 5ERNIE 5.1
NYT Connections (extended)94.3%23.4%
LMArena Hard Prompts15251481
ARC-AGI-290.4%—
SimpleBench80.6%—
ARC-AGI-197.5%—
CritPt29.1%—
Chess Puzzles42%—
EBR-Bench45.7%—
Mystery Game Puzzles59%—
DTBench97.9%—
LMCA64.5%—
Bench to the Future 30.12—
Epoch Capabilities Index162.67—

Math Claude Opus 5 leads

Claude Opus 5: 86.1 (#6), ERNIE 5.1: 37.5 (#96)

BenchmarkClaude Opus 5ERNIE 5.1
LMArena Math15331481
FrontierMath (Tiers 1-3)85.6%—
FrontierMath Tier 473.2%—
OTIS Mock AIME 2024-202598.9%—
ProofBench99%—

Knowledge Claude Opus 5 leads

Claude Opus 5: 66.8 (#8), ERNIE 5.1: 41.2 (#103)

BenchmarkClaude Opus 5ERNIE 5.1
LMArena Expert15581491
GPQA Diamond93.9%—
SimpleQA Verified59.9%—

Multimodal Not comparable

Claude Opus 5: 51.1 (#6), ERNIE 5.1: —

BenchmarkClaude Opus 5ERNIE 5.1
LMArena Vision1321—
Blueprint-Bench 230.4%—
Furniture Assembly60.8%—
LMArena Document1516—

Multilingual Claude Opus 5 leads

Claude Opus 5: 58.8 (#3), ERNIE 5.1: 55.7 (#28)

BenchmarkClaude Opus 5ERNIE 5.1
LMArena Non-English15001455
LMArena Chinese15751507
LMArena French15221486
LMArena German15221470
LMArena Japanese15101422
LMArena Korean15261428
LMArena Russian15071459
LMArena Spanish15191472

Instruction Following Claude Opus 5 leads

Claude Opus 5: 79.3 (#5), ERNIE 5.1: 76.9 (#35)

BenchmarkClaude Opus 5ERNIE 5.1
LMArena Instruction Following15161460

Long Context Claude Opus 5 leads

Claude Opus 5: 46.5 (#20), ERNIE 5.1: 44.7 (#56)

BenchmarkClaude Opus 5ERNIE 5.1
LMArena Longer Query15161462

Writing & Preference Claude Opus 5 leads

Claude Opus 5: 79.3 (#2), ERNIE 5.1: 65.3 (#50)

BenchmarkClaude Opus 5ERNIE 5.1
LMArena Text15061468
LMArena Creative Writing14911440
LMArena Multi-Turn14961471
EQ-Bench Creative Writing2133—
EQ-Bench 41385—

Frequently asked questions

Is Claude Opus 5 better than ERNIE 5.1?

Claude Opus 5 is the stronger model overall, scoring 67.7 to 43.1 on the Noometry Index.

Is Claude Opus 5 or ERNIE 5.1 better for coding?

Claude Opus 5 scores higher on coding benchmarks: 67.0 versus 43.4 in the Noometry coding category.

How many benchmarks do Claude Opus 5 and ERNIE 5.1 share?

18 benchmarks have published results for both models. Claude Opus 5 has 57 scored results on Noometry and ERNIE 5.1 has 19.

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