Noometry

Model comparison

ERNIE 5.1 vs GPT-5.5

GPT-5.5 is the stronger model overall, scoring 63.4 to 43.8 on the Noometry Index.

Last verified . 19 shared benchmarks.

ERNIE 5.1 Baidu

43.8

Rank #83 Confirmed

GPT-5.5 OpenAI

63.4

Rank #9 Confirmed

Summary

  • They share 19 benchmarks with published results for both. ERNIE 5.1 scores higher in 0 categories and GPT-5.5 in 8 categories; 6 gaps are clear of the uncertainty.
  • The widest gap is in reasoning, where GPT-5.5 leads 72.8 to 21.9.
  • The biggest single-benchmark swing is NYT Connections (extended): 23.4% for ERNIE 5.1 and 96.2% for GPT-5.5.

Side by side

ERNIE 5.1GPT-5.5
ProviderBaiduOpenAI
Noometry Index43.863.4
Released—2026-04-23
WeightsProprietaryProprietary
Context window—1.05M
Max output—128K
Input $ / M tokens—$5
Output $ / M tokens—$30
Results tracked1971

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Category by category

Coding GPT-5.5 leads

ERNIE 5.1: 44.0 (#76), GPT-5.5: 58.2 (#17)

BenchmarkERNIE 5.1GPT-5.5
LMArena Coding14881494
SWE-bench Verified—80.6%
DeepSWE—67%
FrontierCode—43%
LMArena WebDev—1513
SciCode—56.1%
GSO—40.2%
WeirdML—84.9%
MirrorCode—10%
ALE-Bench—1,943

Agentic & Tool Use Not comparable

ERNIE 5.1: —, GPT-5.5: 50.7 (#6)

BenchmarkERNIE 5.1GPT-5.5
LMArena Search12271242
Terminal-Bench—84.7%
APEX-Agents—55.1%
OSWorld 2.0—13%
Remote Labor Index—6.3%
τ²-bench Banking—44.6%
DeepResearch Bench—54%
PostTrainBench—27.2%
ExploitBench—47.4%
GBAEval—53.2%
GDP.pdf—26%
Vending-Bench 2—7,524

Reasoning GPT-5.5 leads

ERNIE 5.1: 21.9 (#211), GPT-5.5: 72.8 (#11)

BenchmarkERNIE 5.1GPT-5.5
NYT Connections (extended)23.4%96.2%
LMArena Hard Prompts14811489
ARC-AGI-2—85%
SimpleBench—69%
Kagi LLM Benchmark—88.8%
ARC-AGI-1—95%
CritPt—27.1%
Chess Puzzles—54%
EBR-Bench—34.3%
Mystery Game Puzzles—56%
DTBench—96%
LMCA—54.3%
Surface Evolver Bench—88.1%
Bench to the Future 3—0.14
Epoch Capabilities Index—159.1
ForecastBench—60.6

Math GPT-5.5 leads

ERNIE 5.1: 40.3 (#92), GPT-5.5: 81.7 (#11)

BenchmarkERNIE 5.1GPT-5.5
LMArena Math14811486
FrontierMath (Tiers 1-3)—85.3%
FrontierMath Tier 4—72.5%
MathArena Final-Answer Competitions—94.3%
OTIS Mock AIME 2024-2025—100%
ProofBench—50%
FrontierMath (Feb 2025 set)—51.7%
FrontierMath Erdős—0%
FrontierMath Tier 4 (v1)—35.4%

Knowledge GPT-5.5 leads

ERNIE 5.1: 41.9 (#102), GPT-5.5: 64.4 (#17)

BenchmarkERNIE 5.1GPT-5.5
LMArena Expert14921508
GPQA Diamond—94%
SimpleQA Verified—63%
Vectara Hallucination Rate—9.3%

Multimodal Not comparable

ERNIE 5.1: —, GPT-5.5: 46.9 (#12)

BenchmarkERNIE 5.1GPT-5.5
LMArena Vision—1297
Blueprint-Bench 2—36.2%
Furniture Assembly—44.2%
LMArena Document—1486

Multilingual Too close to call

ERNIE 5.1: 55.5 (#29), GPT-5.5: 56.4 (#20)

BenchmarkERNIE 5.1GPT-5.5
LMArena Non-English14541467
LMArena Chinese15081533
LMArena French14881486
LMArena German14701480
LMArena Japanese14221498
LMArena Korean14271460
LMArena Russian14591473
LMArena Spanish14731468

Instruction Following Too close to call

ERNIE 5.1: 76.7 (#37), GPT-5.5: 77.5 (#18)

BenchmarkERNIE 5.1GPT-5.5
LMArena Instruction Following14601479

Long Context GPT-5.5 leads

ERNIE 5.1: 44.7 (#59), GPT-5.5: 48.3 (#12)

BenchmarkERNIE 5.1GPT-5.5
LMArena Longer Query14621484
CL-bench Life—22.2%

Writing & Preference GPT-5.5 leads

ERNIE 5.1: 65.1 (#52), GPT-5.5: 72.7 (#13)

BenchmarkERNIE 5.1GPT-5.5
LMArena Text14681472
LMArena Creative Writing14411455
LMArena Multi-Turn14711476
EQ-Bench Creative Writing—1844
EQ-Bench 4—1315

Frequently asked questions

Is ERNIE 5.1 better than GPT-5.5?

GPT-5.5 is the stronger model overall, scoring 63.4 to 43.8 on the Noometry Index.

Is ERNIE 5.1 or GPT-5.5 better for coding?

GPT-5.5 scores higher on coding benchmarks: 58.2 versus 44.0 in the Noometry coding category.

How many benchmarks do ERNIE 5.1 and GPT-5.5 share?

19 benchmarks have published results for both models. ERNIE 5.1 has 19 scored results on Noometry and GPT-5.5 has 71.

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