# ERNIE 5.1 vs Kimi K2 (Jul 2025)

> ERNIE 5.1 is the stronger model overall, scoring 43.8 to 41.2 on the Noometry Index.

- Canonical page: https://noometry.com/compare/ernie-5-1-vs-kimi-k2
- Last updated: 2026-10-10
- Shared benchmarks: 17

## Summary

- They share 17 benchmarks with published results for both. ERNIE 5.1 scores higher in 6 categories and Kimi K2 (Jul 2025) in 2 categories; 8 gaps are clear of the uncertainty.
- The widest gap is in multilingual, where ERNIE 5.1 leads 55.5 to 49.6.
- Kimi K2 (Jul 2025) has downloadable open weights; the other is API-only.

## Snapshot

| | ERNIE 5.1 | Kimi K2 (Jul 2025) |
|---|---|---|
| Provider | Baidu | Moonshot AI |
| Noometry Index | 43.8 | 41.2 |
| Rank | 83 | 140 |
| Context | — | 262K |
| Input $/M | — | $0.57 |
| Output $/M | — | $2.30 |
| Weights | Proprietary | Open |

## Coding

- ERNIE 5.1: 44.0 (#76)
- Kimi K2 (Jul 2025): 42.4 (#102)

| Benchmark | ERNIE 5.1 | Kimi K2 (Jul 2025) |
|---|---|---|
| LMArena Coding | 1488 | 1399 |
| SWE-bench Verified (bash only) | — | 63.4% |
| Aider Polyglot | — | 59.1% |
| GSO | — | 4.9% |
| WeirdML | — | 42.8% |
| ALE-Bench | — | 597.5 |

## Agentic & Tool Use

- ERNIE 5.1: —
- Kimi K2 (Jul 2025): 32.4 (#64)

| Benchmark | ERNIE 5.1 | Kimi K2 (Jul 2025) |
|---|---|---|
| Terminal-Bench | — | 35.7% |
| Berkeley Function Calling Leaderboard | — | 59.1% |
| LMArena Search | 1227 | — |
| METR Time Horizons | — | 59.2% |

## Reasoning

- ERNIE 5.1: 21.9 (#211)
- Kimi K2 (Jul 2025): 23.3 (#179)

| Benchmark | ERNIE 5.1 | Kimi K2 (Jul 2025) |
|---|---|---|
| LMArena Hard Prompts | 1481 | 1384 |
| SimpleBench | — | 26.3% |
| Kagi LLM Benchmark | — | 64.4% |
| NYT Connections (extended) | 23.4% | — |
| Epoch Capabilities Index | — | 146.01 |
| ForecastBench | — | 60.2 |

## Math

- ERNIE 5.1: 40.3 (#92)
- Kimi K2 (Jul 2025): 42.7 (#83)

| Benchmark | ERNIE 5.1 | Kimi K2 (Jul 2025) |
|---|---|---|
| LMArena Math | 1481 | 1397 |
| Omni-MATH | — | 65.4% |
| FrontierMath (Feb 2025 set) | — | 21.4% |
| FrontierMath Tier 4 (v1) | — | 0% |

## Knowledge

- ERNIE 5.1: 41.9 (#102)
- Kimi K2 (Jul 2025): 37.3 (#157)

| Benchmark | ERNIE 5.1 | Kimi K2 (Jul 2025) |
|---|---|---|
| LMArena Expert | 1492 | 1365 |
| MMLU-Pro | — | 81.9% |
| Confabulations | — | 20.4% |
| Vectara Hallucination Rate | — | 17.9% |
| GPQA (HELM) | — | 65.3% |

## Multilingual

- ERNIE 5.1: 55.5 (#29)
- Kimi K2 (Jul 2025): 49.6 (#130)

| Benchmark | ERNIE 5.1 | Kimi K2 (Jul 2025) |
|---|---|---|
| LMArena Non-English | 1454 | 1372 |
| LMArena Chinese | 1508 | 1415 |
| LMArena French | 1488 | 1379 |
| LMArena German | 1470 | 1387 |
| LMArena Japanese | 1422 | 1349 |
| LMArena Korean | 1427 | 1325 |
| LMArena Russian | 1459 | 1385 |
| LMArena Spanish | 1473 | 1386 |

## Instruction Following

- ERNIE 5.1: 76.7 (#37)
- Kimi K2 (Jul 2025): 71.1 (#156)

| Benchmark | ERNIE 5.1 | Kimi K2 (Jul 2025) |
|---|---|---|
| LMArena Instruction Following | 1460 | 1348 |
| IFEval | — | 85% |

## Long Context

- ERNIE 5.1: 44.7 (#59)
- Kimi K2 (Jul 2025): 41.2 (#145)

| Benchmark | ERNIE 5.1 | Kimi K2 (Jul 2025) |
|---|---|---|
| LMArena Longer Query | 1462 | 1353 |
| Fiction.LiveBench | — | 66.7% |
| CL-bench | — | 17.6% |

## Writing & Preference

- ERNIE 5.1: 65.1 (#52)
- Kimi K2 (Jul 2025): 62.3 (#78)

| Benchmark | ERNIE 5.1 | Kimi K2 (Jul 2025) |
|---|---|---|
| LMArena Text | 1468 | 1380 |
| LMArena Creative Writing | 1441 | 1350 |
| LMArena Multi-Turn | 1471 | 1371 |
| Short-Story Creative Writing | — | 85.6% |
| EQ-Bench Creative Writing | — | 1666 |
| WildBench | — | 86.2% |

## FAQ

### Is ERNIE 5.1 better than Kimi K2 (Jul 2025)?

ERNIE 5.1 is the stronger model overall, scoring 43.8 to 41.2 on the Noometry Index.

### Is ERNIE 5.1 or Kimi K2 (Jul 2025) better for coding?

ERNIE 5.1 scores higher on coding benchmarks: 44.0 versus 42.4 in the Noometry coding category.

### How many benchmarks do ERNIE 5.1 and Kimi K2 (Jul 2025) share?

17 benchmarks have published results for both models. ERNIE 5.1 has 19 scored results on Noometry and Kimi K2 (Jul 2025) has 42.