# Claude 3 Haiku vs Kimi K2 (Jul 2025)

> Kimi K2 (Jul 2025) is the stronger model overall, scoring 40.9 to 25.7 on the Noometry Index.

- Canonical page: https://noometry.com/compare/claude-3-haiku-vs-kimi-k2
- Last updated: 2026-10-10
- Shared benchmarks: 23

## Summary

- They share 23 benchmarks with published results for both. Claude 3 Haiku scores higher in 0 categories and Kimi K2 (Jul 2025) in 8 categories; 8 gaps are clear of the uncertainty.
- The widest gap is in writing & preference, where Kimi K2 (Jul 2025) leads 62.5 to 29.8.
- The biggest single-benchmark swing is WeirdML: 9.8% for Claude 3 Haiku and 42.8% for Kimi K2 (Jul 2025).
- Kimi K2 (Jul 2025) has downloadable open weights; the other is API-only.

## Snapshot

| | Claude 3 Haiku | Kimi K2 (Jul 2025) |
|---|---|---|
| Provider | Anthropic | Moonshot AI |
| Noometry Index | 25.7 | 40.9 |
| Rank | 333 | 134 |
| Context | — | 262K |
| Input $/M | — | $0.57 |
| Output $/M | — | $2.30 |
| Weights | Proprietary | Open |

## Coding

- Claude 3 Haiku: 26.1 (#320)
- Kimi K2 (Jul 2025): 43.1 (#83)

| Benchmark | Claude 3 Haiku | Kimi K2 (Jul 2025) |
|---|---|---|
| WeirdML | 9.8% | 42.8% |
| LMArena Coding | 1199 | 1399 |
| SWE-bench Verified (bash only) | — | 63.4% |
| Aider Polyglot | — | 59.1% |
| GSO | — | 4.9% |
| BigCodeBench Instruct | 39.4% | — |
| BigCodeBench Complete | 50.1% | — |
| CadEval | 12% | — |
| ALE-Bench | — | 597.5 |
| HumanEval+ | 68.9% | — |
| MBPP+ | 68.8% | — |

## Agentic & Tool Use

- Claude 3 Haiku: —
- Kimi K2 (Jul 2025): 32.2 (#59)

| Benchmark | Claude 3 Haiku | Kimi K2 (Jul 2025) |
|---|---|---|
| Terminal-Bench | — | 35.7% |
| Berkeley Function Calling Leaderboard | — | 59.1% |
| METR Time Horizons | — | 59.2% |

## Reasoning

- Claude 3 Haiku: 15.7 (#303)
- Kimi K2 (Jul 2025): 22.7 (#173)

| Benchmark | Claude 3 Haiku | Kimi K2 (Jul 2025) |
|---|---|---|
| Kagi LLM Benchmark | 34.2% | 64.4% |
| LMArena Hard Prompts | 1174 | 1384 |
| Epoch Capabilities Index | 118.3 | 146.02 |
| ForecastBench | 53.2 | 60.2 |
| SimpleBench | — | 26.3% |
| DTBench | 50.1% | — |
| LMCA | 8.8% | — |
| WinoGrande | 74.2% | — |

## Math

- Claude 3 Haiku: 9.2 (#313)
- Kimi K2 (Jul 2025): 40.1 (#81)

| Benchmark | Claude 3 Haiku | Kimi K2 (Jul 2025) |
|---|---|---|
| LMArena Math | 1188 | 1396 |
| OTIS Mock AIME 2024-2025 | 1.8% | — |
| Omni-MATH | — | 65.4% |
| MATH Level 5 | 14.9% | — |
| FrontierMath (Feb 2025 set) | — | 21.4% |
| FrontierMath Tier 4 (v1) | — | 0% |

## Knowledge

- Claude 3 Haiku: 17.3 (#280)
- Kimi K2 (Jul 2025): 36.9 (#153)

| Benchmark | Claude 3 Haiku | Kimi K2 (Jul 2025) |
|---|---|---|
| Confabulations | 34.2% | 20.4% |
| LMArena Expert | 1148 | 1363 |
| GPQA Diamond | 36.3% | — |
| MMLU-Pro | — | 81.9% |
| Vectara Hallucination Rate | — | 17.9% |
| GPQA (HELM) | — | 65.3% |
| MMLU | 73.8% | — |

## Multimodal

- Claude 3 Haiku: 23.1 (#123)
- Kimi K2 (Jul 2025): —

| Benchmark | Claude 3 Haiku | Kimi K2 (Jul 2025) |
|---|---|---|
| LMArena Vision | 950 | — |
| ScienceQA | 72% | — |

## Multilingual

- Claude 3 Haiku: 36.1 (#238)
- Kimi K2 (Jul 2025): 49.8 (#125)

| Benchmark | Claude 3 Haiku | Kimi K2 (Jul 2025) |
|---|---|---|
| LMArena Non-English | 1178 | 1372 |
| LMArena Chinese | 1155 | 1416 |
| LMArena French | 1194 | 1379 |
| LMArena German | 1174 | 1386 |
| LMArena Japanese | 1102 | 1349 |
| LMArena Korean | 1108 | 1324 |
| LMArena Russian | 1204 | 1384 |
| LMArena Spanish | 1165 | 1383 |

## Instruction Following

- Claude 3 Haiku: 61.5 (#242)
- Kimi K2 (Jul 2025): 71.3 (#151)

| Benchmark | Claude 3 Haiku | Kimi K2 (Jul 2025) |
|---|---|---|
| LMArena Instruction Following | 1174 | 1347 |
| IFEval | — | 85% |

## Long Context

- Claude 3 Haiku: 36.1 (#232)
- Kimi K2 (Jul 2025): 41.2 (#140)

| Benchmark | Claude 3 Haiku | Kimi K2 (Jul 2025) |
|---|---|---|
| LMArena Longer Query | 1191 | 1353 |
| Fiction.LiveBench | — | 66.7% |
| CL-bench | — | 17.6% |

## Writing & Preference

- Claude 3 Haiku: 29.8 (#286)
- Kimi K2 (Jul 2025): 62.5 (#76)

| Benchmark | Claude 3 Haiku | Kimi K2 (Jul 2025) |
|---|---|---|
| LMArena Text | 1195 | 1380 |
| LMArena Creative Writing | 1157 | 1349 |
| EQ-Bench Creative Writing | 717 | 1666 |
| LMArena Multi-Turn | 1190 | 1371 |
| Short-Story Creative Writing | — | 85.6% |
| WildBench | — | 86.2% |

## FAQ

### Is Claude 3 Haiku better than Kimi K2 (Jul 2025)?

Kimi K2 (Jul 2025) is the stronger model overall, scoring 40.9 to 25.7 on the Noometry Index.

### Is Claude 3 Haiku or Kimi K2 (Jul 2025) better for coding?

Kimi K2 (Jul 2025) scores higher on coding benchmarks: 43.1 versus 26.1 in the Noometry coding category.

### How many benchmarks do Claude 3 Haiku and Kimi K2 (Jul 2025) share?

23 benchmarks have published results for both models. Claude 3 Haiku has 37 scored results on Noometry and Kimi K2 (Jul 2025) has 42.