# Kimi K2 (Jul 2025) vs o1-mini

> Kimi K2 (Jul 2025) is the stronger model overall, scoring 40.9 to 33.7 on the Noometry Index.

- Canonical page: https://noometry.com/compare/kimi-k2-vs-o1-mini
- Last updated: 2026-10-10
- Shared benchmarks: 24

## Summary

- They share 24 benchmarks with published results for both. Kimi K2 (Jul 2025) scores higher in 9 categories and o1-mini in 0 categories; 9 gaps are clear of the uncertainty.
- The widest gap is in writing & preference, where Kimi K2 (Jul 2025) leads 62.5 to 48.6.
- The biggest single-benchmark swing is Aider Polyglot: 59.1% for Kimi K2 (Jul 2025) and 32.9% for o1-mini.
- Kimi K2 (Jul 2025) has downloadable open weights; the other is API-only.

## Snapshot

| | Kimi K2 (Jul 2025) | o1-mini |
|---|---|---|
| Provider | Moonshot AI | OpenAI |
| Noometry Index | 40.9 | 33.7 |
| Rank | 134 | 230 |
| Context | 262K | — |
| Input $/M | $0.57 | — |
| Output $/M | $2.30 | — |
| Weights | Open | Proprietary |

## Coding

- Kimi K2 (Jul 2025): 43.1 (#83)
- o1-mini: 35.1 (#218)

| Benchmark | Kimi K2 (Jul 2025) | o1-mini |
|---|---|---|
| Aider Polyglot | 59.1% | 32.9% |
| WeirdML | 42.8% | 36.3% |
| LMArena Coding | 1399 | 1362 |
| SWE-bench Verified (bash only) | 63.4% | — |
| GSO | 4.9% | — |
| LiveBench Coding | — | 48% |
| ALE-Bench | 597.5 | — |
| HumanEval+ | — | 89% |
| MBPP+ | — | 78.8% |

## Agentic & Tool Use

- Kimi K2 (Jul 2025): 32.2 (#59)
- o1-mini: 24.3 (#112)

| Benchmark | Kimi K2 (Jul 2025) | o1-mini |
|---|---|---|
| Terminal-Bench | 35.7% | — |
| Berkeley Function Calling Leaderboard | 59.1% | — |
| Cybench | — | 10% |
| METR Time Horizons | 59.2% | — |

## Reasoning

- Kimi K2 (Jul 2025): 22.7 (#173)
- o1-mini: 8.9 (#340)

| Benchmark | Kimi K2 (Jul 2025) | o1-mini |
|---|---|---|
| SimpleBench | 26.3% | 18.1% |
| LMArena Hard Prompts | 1384 | 1333 |
| Epoch Capabilities Index | 146.02 | 135.82 |
| ARC-AGI-2 | — | 0.8% |
| Kagi LLM Benchmark | 64.4% | — |
| ARC-AGI-1 | — | 14% |
| LiveBench Reasoning | — | 72.3% |
| LiveBench Data Analysis | — | 57.9% |
| ForecastBench | 60.2 | — |
| LiveBench | — | 57.8% |

## Math

- Kimi K2 (Jul 2025): 40.1 (#81)
- o1-mini: 33.7 (#168)

| Benchmark | Kimi K2 (Jul 2025) | o1-mini |
|---|---|---|
| LMArena Math | 1396 | 1358 |
| FrontierMath (Feb 2025 set) | 21.4% | 1.7% |
| OTIS Mock AIME 2024-2025 | — | 46.9% |
| Omni-MATH | 65.4% | — |
| LiveBench Math | — | 62% |
| MATH Level 5 | — | 89.2% |
| FrontierMath Tier 4 (v1) | 0% | — |

## Knowledge

- Kimi K2 (Jul 2025): 36.9 (#153)
- o1-mini: 34.8 (#180)

| Benchmark | Kimi K2 (Jul 2025) | o1-mini |
|---|---|---|
| Confabulations | 20.4% | 18.6% |
| LMArena Expert | 1363 | 1316 |
| GPQA Diamond | — | 62.4% |
| MMLU-Pro | 81.9% | — |
| Vectara Hallucination Rate | 17.9% | — |
| GPQA (HELM) | 65.3% | — |

## Multilingual

- Kimi K2 (Jul 2025): 49.8 (#125)
- o1-mini: 43.8 (#177)

| Benchmark | Kimi K2 (Jul 2025) | o1-mini |
|---|---|---|
| LMArena Non-English | 1372 | 1289 |
| LMArena Chinese | 1416 | 1314 |
| LMArena French | 1379 | 1292 |
| LMArena German | 1386 | 1278 |
| LMArena Japanese | 1349 | 1245 |
| LMArena Korean | 1324 | 1223 |
| LMArena Russian | 1384 | 1283 |
| LMArena Spanish | 1383 | 1302 |

## Instruction Following

- Kimi K2 (Jul 2025): 71.3 (#151)
- o1-mini: 67.0 (#200)

| Benchmark | Kimi K2 (Jul 2025) | o1-mini |
|---|---|---|
| LMArena Instruction Following | 1347 | 1304 |
| LiveBench Instruction Following | — | 65.4% |
| IFEval | 85% | — |

## Long Context

- Kimi K2 (Jul 2025): 41.2 (#140)
- o1-mini: 40.1 (#156)

| Benchmark | Kimi K2 (Jul 2025) | o1-mini |
|---|---|---|
| LMArena Longer Query | 1353 | 1321 |
| Fiction.LiveBench | 66.7% | — |
| CL-bench | 17.6% | — |

## Writing & Preference

- Kimi K2 (Jul 2025): 62.5 (#76)
- o1-mini: 48.6 (#196)

| Benchmark | Kimi K2 (Jul 2025) | o1-mini |
|---|---|---|
| LMArena Text | 1380 | 1317 |
| LMArena Creative Writing | 1349 | 1244 |
| Short-Story Creative Writing | 85.6% | 64.9% |
| LMArena Multi-Turn | 1371 | 1314 |
| EQ-Bench Creative Writing | 1666 | — |
| WildBench | 86.2% | — |
| LiveBench Language | — | 40.9% |

## FAQ

### Is Kimi K2 (Jul 2025) better than o1-mini?

Kimi K2 (Jul 2025) is the stronger model overall, scoring 40.9 to 33.7 on the Noometry Index.

### Is Kimi K2 (Jul 2025) or o1-mini better for coding?

Kimi K2 (Jul 2025) scores higher on coding benchmarks: 43.1 versus 35.1 in the Noometry coding category.

### How many benchmarks do Kimi K2 (Jul 2025) and o1-mini share?

24 benchmarks have published results for both models. Kimi K2 (Jul 2025) has 42 scored results on Noometry and o1-mini has 39.