Model comparison
Kimi K2 (Jul 2025) vs Qwen2.5 Plus 1127
Kimi K2 (Jul 2025) is the stronger model overall, scoring 40.9 to 38.1 on the Noometry Index.
Last verified . 14 shared benchmarks.
Alibaba (Qwen)Summary
- They share 14 benchmarks with published results for both. Kimi K2 (Jul 2025) scores higher in 7 categories and Qwen2.5 Plus 1127 in 1 category; 8 gaps are clear of the uncertainty.
- The widest gap is in writing & preference, where Kimi K2 (Jul 2025) leads 62.5 to 49.5.
- Kimi K2 (Jul 2025) has downloadable open weights; the other is API-only.
Side by side
| Kimi K2 (Jul 2025) | Qwen2.5 Plus 1127 | |
|---|---|---|
| Provider | Moonshot AI | Alibaba (Qwen) |
| Noometry Index | 40.9 | 38.1 |
| Released | 2025-07-12 | — |
| Weights | Open | Proprietary |
| Context window | 262K | — |
| Max output | 262K | — |
| Input $ / M tokens | $0.57 | — |
| Output $ / M tokens | $2.30 | — |
| Results tracked | 42 | 14 |
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Category by category
Coding Kimi K2 (Jul 2025) leads
Kimi K2 (Jul 2025): 43.1 (#83), Qwen2.5 Plus 1127: 37.9 (#171)
| Benchmark | Kimi K2 (Jul 2025) | Qwen2.5 Plus 1127 |
|---|---|---|
| LMArena Coding | 1399 | 1314 |
| SWE-bench Verified (bash only) | 63.4% | — |
| Aider Polyglot | 59.1% | — |
| GSO | 4.9% | — |
| WeirdML | 42.8% | — |
| ALE-Bench | 597.5 | — |
Agentic & Tool Use Not comparable
Kimi K2 (Jul 2025): 32.2 (#59), Qwen2.5 Plus 1127: —
| Benchmark | Kimi K2 (Jul 2025) | Qwen2.5 Plus 1127 |
|---|---|---|
| Terminal-Bench | 35.7% | — |
| Berkeley Function Calling Leaderboard | 59.1% | — |
| METR Time Horizons | 59.2% | — |
Reasoning Qwen2.5 Plus 1127 leads
Kimi K2 (Jul 2025): 22.7 (#173), Qwen2.5 Plus 1127: 24.8 (#139)
| Benchmark | Kimi K2 (Jul 2025) | Qwen2.5 Plus 1127 |
|---|---|---|
| LMArena Hard Prompts | 1384 | 1299 |
| SimpleBench | 26.3% | — |
| Kagi LLM Benchmark | 64.4% | — |
| Epoch Capabilities Index | 146.02 | — |
| ForecastBench | 60.2 | — |
Math Kimi K2 (Jul 2025) leads
Kimi K2 (Jul 2025): 40.1 (#81), Qwen2.5 Plus 1127: 33.5 (#175)
| Benchmark | Kimi K2 (Jul 2025) | Qwen2.5 Plus 1127 |
|---|---|---|
| LMArena Math | 1396 | 1298 |
| Omni-MATH | 65.4% | — |
| FrontierMath (Feb 2025 set) | 21.4% | — |
| FrontierMath Tier 4 (v1) | 0% | — |
Knowledge Kimi K2 (Jul 2025) leads
Kimi K2 (Jul 2025): 36.9 (#153), Qwen2.5 Plus 1127: 34.9 (#179)
| Benchmark | Kimi K2 (Jul 2025) | Qwen2.5 Plus 1127 |
|---|---|---|
| LMArena Expert | 1363 | 1289 |
| MMLU-Pro | 81.9% | — |
| Confabulations | 20.4% | — |
| Vectara Hallucination Rate | 17.9% | — |
| GPQA (HELM) | 65.3% | — |
Multilingual Kimi K2 (Jul 2025) leads
Kimi K2 (Jul 2025): 49.8 (#125), Qwen2.5 Plus 1127: 42.1 (#196)
| Benchmark | Kimi K2 (Jul 2025) | Qwen2.5 Plus 1127 |
|---|---|---|
| LMArena Non-English | 1372 | 1265 |
| LMArena Chinese | 1416 | 1314 |
| LMArena German | 1386 | 1231 |
| LMArena Japanese | 1349 | 1207 |
| LMArena Russian | 1384 | 1271 |
| LMArena French | 1379 | — |
| LMArena Korean | 1324 | — |
| LMArena Spanish | 1383 | — |
Instruction Following Kimi K2 (Jul 2025) leads
Kimi K2 (Jul 2025): 71.3 (#151), Qwen2.5 Plus 1127: 67.4 (#194)
| Benchmark | Kimi K2 (Jul 2025) | Qwen2.5 Plus 1127 |
|---|---|---|
| LMArena Instruction Following | 1347 | 1275 |
| IFEval | 85% | — |
Long Context Kimi K2 (Jul 2025) leads
Kimi K2 (Jul 2025): 41.2 (#140), Qwen2.5 Plus 1127: 39.2 (#180)
| Benchmark | Kimi K2 (Jul 2025) | Qwen2.5 Plus 1127 |
|---|---|---|
| LMArena Longer Query | 1353 | 1292 |
| Fiction.LiveBench | 66.7% | — |
| CL-bench | 17.6% | — |
Writing & Preference Kimi K2 (Jul 2025) leads
Kimi K2 (Jul 2025): 62.5 (#76), Qwen2.5 Plus 1127: 49.5 (#186)
| Benchmark | Kimi K2 (Jul 2025) | Qwen2.5 Plus 1127 |
|---|---|---|
| LMArena Text | 1380 | 1299 |
| LMArena Creative Writing | 1349 | 1262 |
| LMArena Multi-Turn | 1371 | 1299 |
| Short-Story Creative Writing | 85.6% | — |
| EQ-Bench Creative Writing | 1666 | — |
| WildBench | 86.2% | — |
Frequently asked questions
Is Kimi K2 (Jul 2025) better than Qwen2.5 Plus 1127?
Kimi K2 (Jul 2025) is the stronger model overall, scoring 40.9 to 38.1 on the Noometry Index.
Is Kimi K2 (Jul 2025) or Qwen2.5 Plus 1127 better for coding?
Kimi K2 (Jul 2025) scores higher on coding benchmarks: 43.1 versus 37.9 in the Noometry coding category.
How many benchmarks do Kimi K2 (Jul 2025) and Qwen2.5 Plus 1127 share?
14 benchmarks have published results for both models. Kimi K2 (Jul 2025) has 42 scored results on Noometry and Qwen2.5 Plus 1127 has 14.