Model comparison
ERNIE 5.1 vs GPT-5-Codex
ERNIE 5.1 is the stronger model overall, scoring 43.1 to 37.3 on the Noometry Index.
Last verified . 0 shared benchmarks.
BaiduSummary
- The widest gap is in reasoning, where GPT-5-Codex leads 30.0 to 20.9.
Side by side
| ERNIE 5.1 | GPT-5-Codex | |
|---|---|---|
| Provider | Baidu | OpenAI |
| Noometry Index | 43.1 | 37.3 |
| Released | — | 2025-09-15 |
| Weights | Proprietary | Proprietary |
| Context window | — | 400K |
| Max output | — | 128K |
| Input $ / M tokens | — | $1.25 |
| Output $ / M tokens | — | $10 |
| Results tracked | 19 | 3 |
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Category by category
Coding ERNIE 5.1 leads
ERNIE 5.1: 43.4 (#78), GPT-5-Codex: 41.9 (#100)
| Benchmark | ERNIE 5.1 | GPT-5-Codex |
|---|---|---|
| WeirdML | — | 54.5% |
| LMArena Coding | 1488 | — |
Agentic & Tool Use Not comparable
ERNIE 5.1: —, GPT-5-Codex: 30.8 (#66)
| Benchmark | ERNIE 5.1 | GPT-5-Codex |
|---|---|---|
| Terminal-Bench | — | 44.3% |
| LMArena Search | 1227 | — |
Reasoning GPT-5-Codex leads
ERNIE 5.1: 20.9 (#209), GPT-5-Codex: 30.0 (#80)
| Benchmark | ERNIE 5.1 | GPT-5-Codex |
|---|---|---|
| Kagi LLM Benchmark | — | 70.3% |
| NYT Connections (extended) | 23.4% | — |
| LMArena Hard Prompts | 1481 | — |
Math Not comparable
ERNIE 5.1: 37.5 (#96), GPT-5-Codex: —
| Benchmark | ERNIE 5.1 | GPT-5-Codex |
|---|---|---|
| LMArena Math | 1481 | — |
Knowledge Not comparable
ERNIE 5.1: 41.2 (#103), GPT-5-Codex: —
| Benchmark | ERNIE 5.1 | GPT-5-Codex |
|---|---|---|
| LMArena Expert | 1491 | — |
Multilingual Not comparable
ERNIE 5.1: 55.7 (#28), GPT-5-Codex: —
| Benchmark | ERNIE 5.1 | GPT-5-Codex |
|---|---|---|
| LMArena Non-English | 1455 | — |
| LMArena Chinese | 1507 | — |
| LMArena French | 1486 | — |
| LMArena German | 1470 | — |
| LMArena Japanese | 1422 | — |
| LMArena Korean | 1428 | — |
| LMArena Russian | 1459 | — |
| LMArena Spanish | 1472 | — |
Instruction Following Not comparable
ERNIE 5.1: 76.9 (#35), GPT-5-Codex: —
| Benchmark | ERNIE 5.1 | GPT-5-Codex |
|---|---|---|
| LMArena Instruction Following | 1460 | — |
Long Context Not comparable
ERNIE 5.1: 44.7 (#56), GPT-5-Codex: —
| Benchmark | ERNIE 5.1 | GPT-5-Codex |
|---|---|---|
| LMArena Longer Query | 1462 | — |
Writing & Preference Not comparable
ERNIE 5.1: 65.3 (#50), GPT-5-Codex: —
| Benchmark | ERNIE 5.1 | GPT-5-Codex |
|---|---|---|
| LMArena Text | 1468 | — |
| LMArena Creative Writing | 1440 | — |
| LMArena Multi-Turn | 1471 | — |
Frequently asked questions
Is ERNIE 5.1 better than GPT-5-Codex?
ERNIE 5.1 is the stronger model overall, scoring 43.1 to 37.3 on the Noometry Index.
Is ERNIE 5.1 or GPT-5-Codex better for coding?
ERNIE 5.1 scores higher on coding benchmarks: 43.4 versus 41.9 in the Noometry coding category.
How many benchmarks do ERNIE 5.1 and GPT-5-Codex share?
0 benchmarks have published results for both models. ERNIE 5.1 has 19 scored results on Noometry and GPT-5-Codex has 3.