Model comparison
Amazon Nova Experimental Chat 12 10 vs Kimi K2 (Jul 2025)
Amazon Nova Experimental Chat 12 10 is the stronger model overall, scoring 42.9 to 41.2 on the Noometry Index.
Last verified . 12 shared benchmarks.
Summary
- They share 12 benchmarks with published results for both. Amazon Nova Experimental Chat 12 10 scores higher in 5 categories and Kimi K2 (Jul 2025) in 3 categories; 7 gaps are clear of the uncertainty.
- The widest gap is in reasoning, where Amazon Nova Experimental Chat 12 10 leads 29.3 to 23.3.
- Kimi K2 (Jul 2025) has downloadable open weights; the other is API-only.
Side by side
| Amazon Nova Experimental Chat 12 10 | Kimi K2 (Jul 2025) | |
|---|---|---|
| Provider | Amazon | Moonshot AI |
| Noometry Index | 42.9 | 41.2 |
| Released | — | 2025-07-12 |
| Weights | Proprietary | Open |
| Context window | — | 262K |
| Max output | — | 262K |
| Input $ / M tokens | — | $0.57 |
| Output $ / M tokens | — | $2.30 |
| Results tracked | 12 | 42 |
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Category by category
Coding Too close to call
Amazon Nova Experimental Chat 12 10: 42.2 (#110), Kimi K2 (Jul 2025): 42.4 (#102)
| Benchmark | Amazon Nova Experimental Chat 12 10 | Kimi K2 (Jul 2025) |
|---|---|---|
| LMArena Coding | 1430 | 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 Not comparable
Amazon Nova Experimental Chat 12 10: —, Kimi K2 (Jul 2025): 32.4 (#64)
| Benchmark | Amazon Nova Experimental Chat 12 10 | Kimi K2 (Jul 2025) |
|---|---|---|
| Terminal-Bench | — | 35.7% |
| Berkeley Function Calling Leaderboard | — | 59.1% |
| METR Time Horizons | — | 59.2% |
Reasoning Amazon Nova Experimental Chat 12 10 leads
Amazon Nova Experimental Chat 12 10: 29.3 (#94), Kimi K2 (Jul 2025): 23.3 (#179)
| Benchmark | Amazon Nova Experimental Chat 12 10 | Kimi K2 (Jul 2025) |
|---|---|---|
| LMArena Hard Prompts | 1427 | 1384 |
| SimpleBench | — | 26.3% |
| Kagi LLM Benchmark | — | 64.4% |
| Epoch Capabilities Index | — | 146.01 |
| ForecastBench | — | 60.2 |
Math Kimi K2 (Jul 2025) leads
Amazon Nova Experimental Chat 12 10: 38.9 (#124), Kimi K2 (Jul 2025): 42.7 (#83)
| Benchmark | Amazon Nova Experimental Chat 12 10 | Kimi K2 (Jul 2025) |
|---|---|---|
| LMArena Math | 1419 | 1397 |
| Omni-MATH | — | 65.4% |
| FrontierMath (Feb 2025 set) | — | 21.4% |
| FrontierMath Tier 4 (v1) | — | 0% |
Knowledge Amazon Nova Experimental Chat 12 10 leads
Amazon Nova Experimental Chat 12 10: 39.2 (#136), Kimi K2 (Jul 2025): 37.3 (#157)
| Benchmark | Amazon Nova Experimental Chat 12 10 | Kimi K2 (Jul 2025) |
|---|---|---|
| LMArena Expert | 1408 | 1365 |
| MMLU-Pro | — | 81.9% |
| Confabulations | — | 20.4% |
| Vectara Hallucination Rate | — | 17.9% |
| GPQA (HELM) | — | 65.3% |
Multilingual Amazon Nova Experimental Chat 12 10 leads
Amazon Nova Experimental Chat 12 10: 51.4 (#108), Kimi K2 (Jul 2025): 49.6 (#130)
| Benchmark | Amazon Nova Experimental Chat 12 10 | Kimi K2 (Jul 2025) |
|---|---|---|
| LMArena Non-English | 1398 | 1372 |
| LMArena Chinese | 1440 | 1415 |
| LMArena Russian | 1395 | 1385 |
| LMArena French | — | 1379 |
| LMArena German | — | 1387 |
| LMArena Japanese | — | 1349 |
| LMArena Korean | — | 1325 |
| LMArena Spanish | — | 1386 |
Instruction Following Amazon Nova Experimental Chat 12 10 leads
Amazon Nova Experimental Chat 12 10: 73.2 (#123), Kimi K2 (Jul 2025): 71.1 (#156)
| Benchmark | Amazon Nova Experimental Chat 12 10 | Kimi K2 (Jul 2025) |
|---|---|---|
| LMArena Instruction Following | 1387 | 1348 |
| IFEval | — | 85% |
Long Context Amazon Nova Experimental Chat 12 10 leads
Amazon Nova Experimental Chat 12 10: 42.4 (#125), Kimi K2 (Jul 2025): 41.2 (#145)
| Benchmark | Amazon Nova Experimental Chat 12 10 | Kimi K2 (Jul 2025) |
|---|---|---|
| LMArena Longer Query | 1391 | 1353 |
| Fiction.LiveBench | — | 66.7% |
| CL-bench | — | 17.6% |
Writing & Preference Kimi K2 (Jul 2025) leads
Amazon Nova Experimental Chat 12 10: 59.5 (#110), Kimi K2 (Jul 2025): 62.3 (#78)
| Benchmark | Amazon Nova Experimental Chat 12 10 | Kimi K2 (Jul 2025) |
|---|---|---|
| LMArena Text | 1420 | 1380 |
| LMArena Creative Writing | 1350 | 1350 |
| LMArena Multi-Turn | 1409 | 1371 |
| Short-Story Creative Writing | — | 85.6% |
| EQ-Bench Creative Writing | — | 1666 |
| WildBench | — | 86.2% |
Frequently asked questions
Is Amazon Nova Experimental Chat 12 10 better than Kimi K2 (Jul 2025)?
Amazon Nova Experimental Chat 12 10 is the stronger model overall, scoring 42.9 to 41.2 on the Noometry Index.
Is Amazon Nova Experimental Chat 12 10 or Kimi K2 (Jul 2025) better for coding?
They score almost the same on coding (42.2 vs 42.4); test both on your own repository before choosing.
How many benchmarks do Amazon Nova Experimental Chat 12 10 and Kimi K2 (Jul 2025) share?
12 benchmarks have published results for both models. Amazon Nova Experimental Chat 12 10 has 12 scored results on Noometry and Kimi K2 (Jul 2025) has 42.