Model comparison
Amazon Nova Micro vs Kimi K2 (Jul 2025)
Kimi K2 (Jul 2025) is the stronger model overall, scoring 41.2 to 30.4 on the Noometry Index. Amazon Nova Micro costs 16× less per token, which makes it the better buy when Kimi K2 (Jul 2025)'s lead doesn't matter for your workload.
Last verified . 24 shared benchmarks.
Summary
- They share 24 benchmarks with published results for both. Amazon Nova Micro scores higher in 0 categories and Kimi K2 (Jul 2025) in 9 categories; 9 gaps are clear of the uncertainty.
- The widest gap is in writing & preference, where Kimi K2 (Jul 2025) leads 62.3 to 39.5.
- The biggest single-benchmark swing is Omni-MATH: 21.4% for Amazon Nova Micro and 65.4% for Kimi K2 (Jul 2025).
- Amazon Nova Micro is cheaper at $0.035 / $0.14 per million input/output tokens, against $0.57 / $2.30 for Kimi K2 (Jul 2025).
- Kimi K2 (Jul 2025) accepts more context: 262K tokens versus 128K.
- Kimi K2 (Jul 2025) has downloadable open weights; the other is API-only.
Side by side
| Amazon Nova Micro | Kimi K2 (Jul 2025) | |
|---|---|---|
| Provider | Amazon | Moonshot AI |
| Noometry Index | 30.4 | 41.2 |
| Released | 2024-12-03 | 2025-07-12 |
| Weights | Proprietary | Open |
| Context window | 128K | 262K |
| Max output | 10K | 262K |
| Input $ / M tokens | $0.035 | $0.57 |
| Output $ / M tokens | $0.14 | $2.30 |
| Results tracked | 32 | 42 |
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Category by category
Coding Kimi K2 (Jul 2025) leads
Amazon Nova Micro: 30.5 (#295), Kimi K2 (Jul 2025): 42.4 (#102)
| Benchmark | Amazon Nova Micro | Kimi K2 (Jul 2025) |
|---|---|---|
| LMArena Coding | 1218 | 1399 |
| SWE-bench Verified (bash only) | — | 63.4% |
| Aider Polyglot | — | 59.1% |
| GSO | — | 4.9% |
| WeirdML | — | 42.8% |
| LiveBench Coding | 20.2% | — |
| ALE-Bench | — | 597.5 |
Agentic & Tool Use Kimi K2 (Jul 2025) leads
Amazon Nova Micro: 22.1 (#132), Kimi K2 (Jul 2025): 32.4 (#64)
| Benchmark | Amazon Nova Micro | Kimi K2 (Jul 2025) |
|---|---|---|
| Berkeley Function Calling Leaderboard | 22.3% | 59.1% |
| Terminal-Bench | — | 35.7% |
| METR Time Horizons | — | 59.2% |
Reasoning Kimi K2 (Jul 2025) leads
Amazon Nova Micro: 17.4 (#294), Kimi K2 (Jul 2025): 23.3 (#179)
| Benchmark | Amazon Nova Micro | Kimi K2 (Jul 2025) |
|---|---|---|
| LMArena Hard Prompts | 1191 | 1384 |
| SimpleBench | — | 26.3% |
| Kagi LLM Benchmark | — | 64.4% |
| LiveBench Reasoning | 25.1% | — |
| LiveBench Data Analysis | 34% | — |
| Epoch Capabilities Index | — | 146.01 |
| ForecastBench | — | 60.2 |
| LiveBench | 29.6% | — |
Math Kimi K2 (Jul 2025) leads
Amazon Nova Micro: 26.9 (#254), Kimi K2 (Jul 2025): 42.7 (#83)
| Benchmark | Amazon Nova Micro | Kimi K2 (Jul 2025) |
|---|---|---|
| Omni-MATH | 21.4% | 65.4% |
| LMArena Math | 1206 | 1397 |
| LiveBench Math | 34.5% | — |
| FrontierMath (Feb 2025 set) | — | 21.4% |
| FrontierMath Tier 4 (v1) | — | 0% |
Knowledge Kimi K2 (Jul 2025) leads
Amazon Nova Micro: 29.6 (#237), Kimi K2 (Jul 2025): 37.3 (#157)
| Benchmark | Amazon Nova Micro | Kimi K2 (Jul 2025) |
|---|---|---|
| MMLU-Pro | 51.1% | 81.9% |
| Vectara Hallucination Rate | 5.5% | 17.9% |
| GPQA (HELM) | 38.3% | 65.3% |
| LMArena Expert | 1184 | 1365 |
| Confabulations | — | 20.4% |
| MMLU | 70.8% | — |
Multilingual Kimi K2 (Jul 2025) leads
Amazon Nova Micro: 36.5 (#239), Kimi K2 (Jul 2025): 49.6 (#130)
| Benchmark | Amazon Nova Micro | Kimi K2 (Jul 2025) |
|---|---|---|
| LMArena Non-English | 1186 | 1372 |
| LMArena Chinese | 1209 | 1415 |
| LMArena French | 1238 | 1379 |
| LMArena German | 1192 | 1387 |
| LMArena Japanese | 1154 | 1349 |
| LMArena Korean | 1150 | 1325 |
| LMArena Russian | 1185 | 1385 |
| LMArena Spanish | 1225 | 1386 |
Instruction Following Kimi K2 (Jul 2025) leads
Amazon Nova Micro: 56.3 (#272), Kimi K2 (Jul 2025): 71.1 (#156)
| Benchmark | Amazon Nova Micro | Kimi K2 (Jul 2025) |
|---|---|---|
| IFEval | 76% | 85% |
| LMArena Instruction Following | 1174 | 1348 |
| LiveBench Instruction Following | 48% | — |
Long Context Kimi K2 (Jul 2025) leads
Amazon Nova Micro: 36.5 (#229), Kimi K2 (Jul 2025): 41.2 (#145)
| Benchmark | Amazon Nova Micro | Kimi K2 (Jul 2025) |
|---|---|---|
| LMArena Longer Query | 1205 | 1353 |
| Fiction.LiveBench | — | 66.7% |
| CL-bench | — | 17.6% |
Writing & Preference Kimi K2 (Jul 2025) leads
Amazon Nova Micro: 39.5 (#247), Kimi K2 (Jul 2025): 62.3 (#78)
| Benchmark | Amazon Nova Micro | Kimi K2 (Jul 2025) |
|---|---|---|
| LMArena Text | 1208 | 1380 |
| LMArena Creative Writing | 1172 | 1350 |
| WildBench | 74.3% | 86.2% |
| LMArena Multi-Turn | 1178 | 1371 |
| Short-Story Creative Writing | — | 85.6% |
| EQ-Bench Creative Writing | — | 1666 |
| LiveBench Language | 15.8% | — |
Frequently asked questions
Is Amazon Nova Micro better than Kimi K2 (Jul 2025)?
Kimi K2 (Jul 2025) is the stronger model overall, scoring 41.2 to 30.4 on the Noometry Index. Amazon Nova Micro costs 16× less per token, which makes it the better buy when Kimi K2 (Jul 2025)'s lead doesn't matter for your workload.
Which is cheaper, Amazon Nova Micro or Kimi K2 (Jul 2025)?
Amazon Nova Micro is cheaper. It lists at $0.035 per million input tokens and $0.14 per million output tokens; Kimi K2 (Jul 2025) lists at $0.57 and $2.30.
Is Amazon Nova Micro or Kimi K2 (Jul 2025) better for coding?
Kimi K2 (Jul 2025) scores higher on coding benchmarks: 42.4 versus 30.5 in the Noometry coding category.
Which has the bigger context window?
Kimi K2 (Jul 2025) does, with 262K tokens against 128K.
How many benchmarks do Amazon Nova Micro and Kimi K2 (Jul 2025) share?
24 benchmarks have published results for both models. Amazon Nova Micro has 32 scored results on Noometry and Kimi K2 (Jul 2025) has 42.