Noometry

Model comparison

ERNIE 5.1 vs o4-mini

ERNIE 5.1 is the stronger model overall, scoring 43.8 to 41.6 on the Noometry Index.

Last verified . 17 shared benchmarks.

ERNIE 5.1 Baidu

43.8

Rank #83 Confirmed

o4-mini OpenAI

41.6

Rank #132 Confirmed

Summary

  • They share 17 benchmarks with published results for both. ERNIE 5.1 scores higher in 4 categories and o4-mini in 4 categories; 6 gaps are clear of the uncertainty.
  • The widest gap is in writing & preference, where ERNIE 5.1 leads 65.1 to 54.0.

Side by side

ERNIE 5.1o4-mini
ProviderBaiduOpenAI
Noometry Index43.841.6
Released—2025-04-16
WeightsProprietaryProprietary
Context window—200K
Max output—100K
Input $ / M tokens—$1.10
Output $ / M tokens—$4.40
Results tracked1960

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Category by category

Coding ERNIE 5.1 leads

ERNIE 5.1: 44.0 (#76), o4-mini: 40.9 (#127)

BenchmarkERNIE 5.1o4-mini
LMArena Coding14881368
SWE-bench Verified (bash only)—45%
Aider Polyglot—72%
GSO—3.6%
WeirdML—52.6%
CadEval—62%
ALE-Bench—826.17
AlgoTune—1.72

Agentic & Tool Use Not comparable

ERNIE 5.1: —, o4-mini: 32.6 (#61)

BenchmarkERNIE 5.1o4-mini
Berkeley Function Calling Leaderboard—53.2%
GDPval—25.3%
LMArena Search1227—
METR Time Horizons—63.9%

Reasoning o4-mini leads

ERNIE 5.1: 21.9 (#211), o4-mini: 24.6 (#162)

BenchmarkERNIE 5.1o4-mini
LMArena Hard Prompts14811351
ARC-AGI-2—6.1%
SimpleBench—38.7%
Kagi LLM Benchmark—67.6%
NYT Connections (extended)23.4%—
ARC-AGI-1—58.7%
CritPt—0.6%
Chess Puzzles—26%
EnigmaEval—9.2%
Mystery Game Puzzles—5%
DTBench—77.6%
LMCA—26.5%
Epoch Capabilities Index—145.64
ForecastBench—61.8

Math Too close to call

ERNIE 5.1: 40.3 (#92), o4-mini: 40.8 (#89)

BenchmarkERNIE 5.1o4-mini
LMArena Math14811389
FrontierMath (Tiers 1-3)—36.1%
FrontierMath Tier 4—4.9%
OTIS Mock AIME 2024-2025—81.7%
Omni-MATH—72%
MATH Level 5—97.8%
FrontierMath (Feb 2025 set)—24.8%
FrontierMath Tier 4 (v1)—6.3%

Knowledge o4-mini leads

ERNIE 5.1: 41.9 (#102), o4-mini: 43.6 (#91)

BenchmarkERNIE 5.1o4-mini
LMArena Expert14921343
GPQA Diamond—79.6%
Humanity's Last Exam—18.1%
SimpleQA Verified—19.6%
MMLU-Pro—82%
Confabulations—15.8%
Vectara Hallucination Rate—18.6%
GPQA (HELM)—73.5%

Multimodal Not comparable

ERNIE 5.1: —, o4-mini: 40.2 (#49)

BenchmarkERNIE 5.1o4-mini
LMArena Vision—1194
GeoBench—64%
VPCT—57.5%

Multilingual ERNIE 5.1 leads

ERNIE 5.1: 55.5 (#29), o4-mini: 47.0 (#154)

BenchmarkERNIE 5.1o4-mini
LMArena Non-English14541337
LMArena Chinese15081354
LMArena French14881364
LMArena German14701336
LMArena Japanese14221308
LMArena Korean14271312
LMArena Russian14591334
LMArena Spanish14731347

Instruction Following ERNIE 5.1 leads

ERNIE 5.1: 76.7 (#37), o4-mini: 75.2 (#68)

BenchmarkERNIE 5.1o4-mini
LMArena Instruction Following14601321
IFEval—92.8%

Long Context Too close to call

ERNIE 5.1: 44.7 (#59), o4-mini: 45.5 (#33)

BenchmarkERNIE 5.1o4-mini
LMArena Longer Query14621315
Fiction.LiveBench—77.8%

Writing & Preference ERNIE 5.1 leads

ERNIE 5.1: 65.1 (#52), o4-mini: 54.0 (#152)

BenchmarkERNIE 5.1o4-mini
LMArena Text14681353
LMArena Creative Writing14411294
LMArena Multi-Turn14711350
Short-Story Creative Writing—75%
WildBench—85.4%

Frequently asked questions

Is ERNIE 5.1 better than o4-mini?

ERNIE 5.1 is the stronger model overall, scoring 43.8 to 41.6 on the Noometry Index.

Is ERNIE 5.1 or o4-mini better for coding?

ERNIE 5.1 scores higher on coding benchmarks: 44.0 versus 40.9 in the Noometry coding category.

How many benchmarks do ERNIE 5.1 and o4-mini share?

17 benchmarks have published results for both models. ERNIE 5.1 has 19 scored results on Noometry and o4-mini has 60.

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