Model comparison
Kimi K2 (Jul 2025) vs Nova Premier 1.0
Kimi K2 (Jul 2025) is the stronger model overall, scoring 41.2 to 38.3 on the Noometry Index.
Last verified . 6 shared benchmarks.
Summary
- They share 6 benchmarks with published results for both. Kimi K2 (Jul 2025) scores higher in 5 categories and Nova Premier 1.0 in 0 categories; 4 gaps are clear of the uncertainty.
- The widest gap is in writing & preference, where Kimi K2 (Jul 2025) leads 62.3 to 51.0.
- The biggest single-benchmark swing is Omni-MATH: 65.4% for Kimi K2 (Jul 2025) and 35% for Nova Premier 1.0.
- Kimi K2 (Jul 2025) is cheaper at $0.57 / $2.30 per million input/output tokens, against $2.50 / $12.50 for Nova Premier 1.0.
- Nova Premier 1.0 accepts more context: 1M tokens versus 262K.
- Kimi K2 (Jul 2025) has downloadable open weights; the other is API-only.
Side by side
| Kimi K2 (Jul 2025) | Nova Premier 1.0 | |
|---|---|---|
| Provider | Moonshot AI | Amazon |
| Noometry Index | 41.2 | 38.3 |
| Released | 2025-07-12 | 2025-04-30 |
| Weights | Open | Proprietary |
| Context window | 262K | 1M |
| Max output | 262K | 10K |
| Input $ / M tokens | $0.57 | $2.50 |
| Output $ / M tokens | $2.30 | $12.50 |
| Results tracked | 42 | 6 |
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Category by category
Coding Not comparable
Kimi K2 (Jul 2025): 42.4 (#102), Nova Premier 1.0: —
| Benchmark | Kimi K2 (Jul 2025) | Nova Premier 1.0 |
|---|---|---|
| SWE-bench Verified (bash only) | 63.4% | — |
| Aider Polyglot | 59.1% | — |
| GSO | 4.9% | — |
| WeirdML | 42.8% | — |
| LMArena Coding | 1399 | — |
| ALE-Bench | 597.5 | — |
Agentic & Tool Use Not comparable
Kimi K2 (Jul 2025): 32.4 (#64), Nova Premier 1.0: —
| Benchmark | Kimi K2 (Jul 2025) | Nova Premier 1.0 |
|---|---|---|
| Terminal-Bench | 35.7% | — |
| Berkeley Function Calling Leaderboard | 59.1% | — |
| METR Time Horizons | 59.2% | — |
Reasoning Too close to call
Kimi K2 (Jul 2025): 23.3 (#179), Nova Premier 1.0: 23.0 (#185)
| Benchmark | Kimi K2 (Jul 2025) | Nova Premier 1.0 |
|---|---|---|
| Kagi LLM Benchmark | 64.4% | 44.8% |
| SimpleBench | 26.3% | — |
| LMArena Hard Prompts | 1384 | — |
| Epoch Capabilities Index | 146.01 | — |
| ForecastBench | 60.2 | — |
Math Kimi K2 (Jul 2025) leads
Kimi K2 (Jul 2025): 42.7 (#83), Nova Premier 1.0: 33.8 (#199)
| Benchmark | Kimi K2 (Jul 2025) | Nova Premier 1.0 |
|---|---|---|
| Omni-MATH | 65.4% | 35% |
| LMArena Math | 1397 | — |
| FrontierMath (Feb 2025 set) | 21.4% | — |
| FrontierMath Tier 4 (v1) | 0% | — |
Knowledge Kimi K2 (Jul 2025) leads
Kimi K2 (Jul 2025): 37.3 (#157), Nova Premier 1.0: 35.8 (#180)
| Benchmark | Kimi K2 (Jul 2025) | Nova Premier 1.0 |
|---|---|---|
| MMLU-Pro | 81.9% | 72.6% |
| GPQA (HELM) | 65.3% | 51.8% |
| Confabulations | 20.4% | — |
| Vectara Hallucination Rate | 17.9% | — |
| LMArena Expert | 1365 | — |
Multilingual Not comparable
Kimi K2 (Jul 2025): 49.6 (#130), Nova Premier 1.0: —
| Benchmark | Kimi K2 (Jul 2025) | Nova Premier 1.0 |
|---|---|---|
| LMArena Non-English | 1372 | — |
| LMArena Chinese | 1415 | — |
| LMArena French | 1379 | — |
| LMArena German | 1387 | — |
| LMArena Japanese | 1349 | — |
| LMArena Korean | 1325 | — |
| LMArena Russian | 1385 | — |
| LMArena Spanish | 1386 | — |
Instruction Following Kimi K2 (Jul 2025) leads
Kimi K2 (Jul 2025): 71.1 (#156), Nova Premier 1.0: 66.8 (#204)
| Benchmark | Kimi K2 (Jul 2025) | Nova Premier 1.0 |
|---|---|---|
| IFEval | 85% | 80.3% |
| LMArena Instruction Following | 1348 | — |
Long Context Not comparable
Kimi K2 (Jul 2025): 41.2 (#145), Nova Premier 1.0: —
| Benchmark | Kimi K2 (Jul 2025) | Nova Premier 1.0 |
|---|---|---|
| Fiction.LiveBench | 66.7% | — |
| CL-bench | 17.6% | — |
| LMArena Longer Query | 1353 | — |
Writing & Preference Kimi K2 (Jul 2025) leads
Kimi K2 (Jul 2025): 62.3 (#78), Nova Premier 1.0: 51.0 (#178)
| Benchmark | Kimi K2 (Jul 2025) | Nova Premier 1.0 |
|---|---|---|
| WildBench | 86.2% | 78.8% |
| LMArena Text | 1380 | — |
| LMArena Creative Writing | 1350 | — |
| Short-Story Creative Writing | 85.6% | — |
| EQ-Bench Creative Writing | 1666 | — |
| LMArena Multi-Turn | 1371 | — |
Frequently asked questions
Is Kimi K2 (Jul 2025) better than Nova Premier 1.0?
Kimi K2 (Jul 2025) is the stronger model overall, scoring 41.2 to 38.3 on the Noometry Index.
Which is cheaper, Kimi K2 (Jul 2025) or Nova Premier 1.0?
Kimi K2 (Jul 2025) is cheaper. It lists at $0.57 per million input tokens and $2.30 per million output tokens; Nova Premier 1.0 lists at $2.50 and $12.50.
Which has the bigger context window?
Nova Premier 1.0 does, with 1M tokens against 262K.
How many benchmarks do Kimi K2 (Jul 2025) and Nova Premier 1.0 share?
6 benchmarks have published results for both models. Kimi K2 (Jul 2025) has 42 scored results on Noometry and Nova Premier 1.0 has 6.