Model comparison
Grok-2 (Dec 2024) vs Kimi K2.5 Instant
Kimi K2.5 Instant is the stronger model overall, scoring 43.6 to 33.7 on the Noometry Index.
Last verified . 16 shared benchmarks.
Summary
- They share 16 benchmarks with published results for both. Grok-2 (Dec 2024) scores higher in 0 categories and Kimi K2.5 Instant in 8 categories; 8 gaps are clear of the uncertainty.
- The widest gap is in math, where Kimi K2.5 Instant leads 39.4 to 20.8.
- Kimi K2.5 Instant has downloadable open weights; the other is API-only.
Side by side
| Grok-2 (Dec 2024) | Kimi K2.5 Instant | |
|---|---|---|
| Provider | xAI | Moonshot AI |
| Noometry Index | 33.7 | 43.6 |
| Released | 2024-08-13 | — |
| Weights | Proprietary | Open |
| Context window | — | — |
| Max output | — | — |
| Input $ / M tokens | — | — |
| Output $ / M tokens | — | — |
| Results tracked | 34 | 18 |
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Category by category
Coding Kimi K2.5 Instant leads
Grok-2 (Dec 2024): 33.3 (#258), Kimi K2.5 Instant: 42.6 (#97)
| Benchmark | Grok-2 (Dec 2024) | Kimi K2.5 Instant |
|---|---|---|
| LMArena Coding | 1287 | 1484 |
| LMArena WebDev | — | 1404 |
| WeirdML | 22.2% | — |
| LiveBench Coding | 46.4% | — |
Reasoning Kimi K2.5 Instant leads
Grok-2 (Dec 2024): 16.9 (#299), Kimi K2.5 Instant: 29.7 (#90)
| Benchmark | Grok-2 (Dec 2024) | Kimi K2.5 Instant |
|---|---|---|
| LMArena Hard Prompts | 1272 | 1443 |
| SimpleBench | 22.7% | — |
| LiveBench Reasoning | 54.8% | — |
| DTBench | 65.2% | — |
| LiveBench Data Analysis | 54.5% | — |
| Epoch Capabilities Index | 130.48 | — |
| LiveBench | 54.3% | — |
Math Kimi K2.5 Instant leads
Grok-2 (Dec 2024): 20.8 (#284), Kimi K2.5 Instant: 39.4 (#105)
| Benchmark | Grok-2 (Dec 2024) | Kimi K2.5 Instant |
|---|---|---|
| LMArena Math | 1283 | 1442 |
| OTIS Mock AIME 2024-2025 | 11.5% | — |
| LiveBench Math | 54.9% | — |
| MATH Level 5 | 63.5% | — |
| FrontierMath (Feb 2025 set) | 0.7% | — |
Knowledge Kimi K2.5 Instant leads
Grok-2 (Dec 2024): 29.8 (#233), Kimi K2.5 Instant: 40.2 (#123)
| Benchmark | Grok-2 (Dec 2024) | Kimi K2.5 Instant |
|---|---|---|
| LMArena Expert | 1254 | 1440 |
| GPQA Diamond | 53.8% | — |
| Confabulations | 20.1% | — |
Multimodal Not comparable
Grok-2 (Dec 2024): —, Kimi K2.5 Instant: 40.2 (#50)
| Benchmark | Grok-2 (Dec 2024) | Kimi K2.5 Instant |
|---|---|---|
| LMArena Vision | — | 1254 |
Multilingual Kimi K2.5 Instant leads
Grok-2 (Dec 2024): 43.1 (#188), Kimi K2.5 Instant: 52.0 (#94)
| Benchmark | Grok-2 (Dec 2024) | Kimi K2.5 Instant |
|---|---|---|
| LMArena Non-English | 1282 | 1406 |
| LMArena Chinese | 1289 | 1449 |
| LMArena French | 1318 | 1403 |
| LMArena German | 1287 | 1413 |
| LMArena Korean | 1237 | 1378 |
| LMArena Russian | 1286 | 1404 |
| LMArena Spanish | 1281 | 1447 |
| LMArena Japanese | 1244 | — |
Instruction Following Kimi K2.5 Instant leads
Grok-2 (Dec 2024): 66.9 (#202), Kimi K2.5 Instant: 75.3 (#65)
| Benchmark | Grok-2 (Dec 2024) | Kimi K2.5 Instant |
|---|---|---|
| LMArena Instruction Following | 1270 | 1430 |
| LiveBench Instruction Following | 69.6% | — |
Long Context Kimi K2.5 Instant leads
Grok-2 (Dec 2024): 38.8 (#190), Kimi K2.5 Instant: 43.9 (#83)
| Benchmark | Grok-2 (Dec 2024) | Kimi K2.5 Instant |
|---|---|---|
| LMArena Longer Query | 1276 | 1435 |
Writing & Preference Kimi K2.5 Instant leads
Grok-2 (Dec 2024): 48.6 (#198), Kimi K2.5 Instant: 60.6 (#95)
| Benchmark | Grok-2 (Dec 2024) | Kimi K2.5 Instant |
|---|---|---|
| LMArena Text | 1305 | 1420 |
| LMArena Creative Writing | 1284 | 1381 |
| LMArena Multi-Turn | 1290 | 1427 |
| Short-Story Creative Writing | 63.6% | — |
| LiveBench Language | 45.6% | — |
Frequently asked questions
Is Grok-2 (Dec 2024) better than Kimi K2.5 Instant?
Kimi K2.5 Instant is the stronger model overall, scoring 43.6 to 33.7 on the Noometry Index.
Is Grok-2 (Dec 2024) or Kimi K2.5 Instant better for coding?
Kimi K2.5 Instant scores higher on coding benchmarks: 42.6 versus 33.3 in the Noometry coding category.
How many benchmarks do Grok-2 (Dec 2024) and Kimi K2.5 Instant share?
16 benchmarks have published results for both models. Grok-2 (Dec 2024) has 34 scored results on Noometry and Kimi K2.5 Instant has 18.