Noometry

Model comparison

ERNIE 5.1 vs GPT-5 Nano

ERNIE 5.1 is the stronger model overall, scoring 43.8 to 33.5 on the Noometry Index.

Last verified . 16 shared benchmarks.

ERNIE 5.1 Baidu

43.8

Rank #83 Confirmed

GPT-5 Nano OpenAI

33.5

Rank #241 Confirmed

Summary

  • They share 16 benchmarks with published results for both. ERNIE 5.1 scores higher in 8 categories and GPT-5 Nano in 0 categories; 8 gaps are clear of the uncertainty.
  • The widest gap is in writing & preference, where ERNIE 5.1 leads 65.1 to 39.1.

Side by side

ERNIE 5.1GPT-5 Nano
ProviderBaiduOpenAI
Noometry Index43.833.5
Released—2025-08-07
WeightsProprietaryProprietary
Context window—400K
Max output—128K
Input $ / M tokens—$0.05
Output $ / M tokens—$0.40
Results tracked1949

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Category by category

Coding ERNIE 5.1 leads

ERNIE 5.1: 44.0 (#76), GPT-5 Nano: 33.6 (#254)

BenchmarkERNIE 5.1GPT-5 Nano
LMArena Coding14881351
SWE-bench Verified (bash only)—34.8%
WeirdML—38.1%
ALE-Bench—718.67

Agentic & Tool Use Not comparable

ERNIE 5.1: —, GPT-5 Nano: 25.8 (#106)

BenchmarkERNIE 5.1GPT-5 Nano
Terminal-Bench—21.8%
Berkeley Function Calling Leaderboard—51.5%
LMArena Search1227—

Reasoning ERNIE 5.1 leads

ERNIE 5.1: 21.9 (#211), GPT-5 Nano: 16.3 (#306)

BenchmarkERNIE 5.1GPT-5 Nano
LMArena Hard Prompts14811328
ARC-AGI-2—2.6%
Kagi LLM Benchmark—62.2%
NYT Connections (extended)23.4%—
ARC-AGI-1—20.7%
Chess Puzzles—27%
Mystery Game Puzzles—9%
DTBench—62.7%
LMCA—7.9%
Epoch Capabilities Index—139.38
ForecastBench—59.1

Math ERNIE 5.1 leads

ERNIE 5.1: 40.3 (#92), GPT-5 Nano: 29.4 (#241)

BenchmarkERNIE 5.1GPT-5 Nano
LMArena Math14811317
FrontierMath (Tiers 1-3)—20%
FrontierMath Tier 4—2.4%
OTIS Mock AIME 2024-2025—81.1%
ProofBench—12%
Omni-MATH—54.6%
MATH Level 5—95.2%
FrontierMath (Feb 2025 set)—8.3%
FrontierMath Tier 4 (v1)—2.1%

Knowledge ERNIE 5.1 leads

ERNIE 5.1: 41.9 (#102), GPT-5 Nano: 35.9 (#178)

BenchmarkERNIE 5.1GPT-5 Nano
LMArena Expert14921321
GPQA Diamond—69.4%
SimpleQA Verified—11.7%
MMLU-Pro—77.8%
Vectara Hallucination Rate—10.5%
GPQA (HELM)—67.9%

Multimodal Not comparable

ERNIE 5.1: —, GPT-5 Nano: 31.3 (#108)

BenchmarkERNIE 5.1GPT-5 Nano
LMArena Vision—1159
VPCT—37.2%

Multilingual ERNIE 5.1 leads

ERNIE 5.1: 55.5 (#29), GPT-5 Nano: 45.3 (#172)

BenchmarkERNIE 5.1GPT-5 Nano
LMArena Non-English14541313
LMArena Chinese15081356
LMArena German14701327
LMArena Japanese14221226
LMArena Korean14271269
LMArena Russian14591296
LMArena Spanish14731360
LMArena French1488—

Instruction Following ERNIE 5.1 leads

ERNIE 5.1: 76.7 (#37), GPT-5 Nano: 75.0 (#79)

BenchmarkERNIE 5.1GPT-5 Nano
LMArena Instruction Following14601306
IFEval—93.2%

Long Context ERNIE 5.1 leads

ERNIE 5.1: 44.7 (#59), GPT-5 Nano: 31.3 (#281)

BenchmarkERNIE 5.1GPT-5 Nano
LMArena Longer Query14621312
Fiction.LiveBench—44.4%

Writing & Preference ERNIE 5.1 leads

ERNIE 5.1: 65.1 (#52), GPT-5 Nano: 39.1 (#249)

BenchmarkERNIE 5.1GPT-5 Nano
LMArena Text14681320
LMArena Creative Writing14411249
LMArena Multi-Turn14711311
EQ-Bench Creative Writing—705
WildBench—80.6%

Frequently asked questions

Is ERNIE 5.1 better than GPT-5 Nano?

ERNIE 5.1 is the stronger model overall, scoring 43.8 to 33.5 on the Noometry Index.

Is ERNIE 5.1 or GPT-5 Nano better for coding?

ERNIE 5.1 scores higher on coding benchmarks: 44.0 versus 33.6 in the Noometry coding category.

How many benchmarks do ERNIE 5.1 and GPT-5 Nano share?

16 benchmarks have published results for both models. ERNIE 5.1 has 19 scored results on Noometry and GPT-5 Nano has 49.

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