Model comparison
Grok 4.20 Multi-Agent vs Kimi K2.5 Instant
Grok 4.20 Multi-Agent is the stronger model overall, scoring 46.2 to 43.6 on the Noometry Index.
Last verified . 17 shared benchmarks.
Summary
- They share 17 benchmarks with published results for both. Grok 4.20 Multi-Agent scores higher in 6 categories and Kimi K2.5 Instant in 3 categories; 3 gaps are clear of the uncertainty.
- The widest gap is in reasoning, where Grok 4.20 Multi-Agent leads 43.9 to 29.7.
- Kimi K2.5 Instant has downloadable open weights; the other is API-only.
Side by side
| Grok 4.20 Multi-Agent | Kimi K2.5 Instant | |
|---|---|---|
| Provider | xAI | Moonshot AI |
| Noometry Index | 46.2 | 43.6 |
| Released | 2026-03-09 | — |
| Weights | Proprietary | Open |
| Context window | 1M | — |
| Max output | 30K | — |
| Input $ / M tokens | $1.25 | — |
| Output $ / M tokens | $2.50 | — |
| Results tracked | 20 | 18 |
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Category by category
Coding Too close to call
Grok 4.20 Multi-Agent: 43.0 (#92), Kimi K2.5 Instant: 42.6 (#97)
| Benchmark | Grok 4.20 Multi-Agent | Kimi K2.5 Instant |
|---|---|---|
| LMArena Coding | 1457 | 1484 |
| LMArena WebDev | — | 1404 |
Agentic & Tool Use Not comparable
Grok 4.20 Multi-Agent: —, Kimi K2.5 Instant: —
| Benchmark | Grok 4.20 Multi-Agent | Kimi K2.5 Instant |
|---|---|---|
| LMArena Search | 1204 | — |
Reasoning Grok 4.20 Multi-Agent leads
Grok 4.20 Multi-Agent: 43.9 (#48), Kimi K2.5 Instant: 29.7 (#90)
| Benchmark | Grok 4.20 Multi-Agent | Kimi K2.5 Instant |
|---|---|---|
| LMArena Hard Prompts | 1448 | 1443 |
| NYT Connections (extended) | 89.6% | — |
Math Too close to call
Grok 4.20 Multi-Agent: 39.4 (#104), Kimi K2.5 Instant: 39.4 (#105)
| Benchmark | Grok 4.20 Multi-Agent | Kimi K2.5 Instant |
|---|---|---|
| LMArena Math | 1442 | 1442 |
Knowledge Too close to call
Grok 4.20 Multi-Agent: 40.4 (#119), Kimi K2.5 Instant: 40.2 (#123)
| Benchmark | Grok 4.20 Multi-Agent | Kimi K2.5 Instant |
|---|---|---|
| LMArena Expert | 1445 | 1440 |
Multimodal Too close to call
Grok 4.20 Multi-Agent: 40.5 (#48), Kimi K2.5 Instant: 40.2 (#50)
| Benchmark | Grok 4.20 Multi-Agent | Kimi K2.5 Instant |
|---|---|---|
| LMArena Vision | 1259 | 1254 |
Multilingual Grok 4.20 Multi-Agent leads
Grok 4.20 Multi-Agent: 54.4 (#43), Kimi K2.5 Instant: 52.0 (#94)
| Benchmark | Grok 4.20 Multi-Agent | Kimi K2.5 Instant |
|---|---|---|
| LMArena Non-English | 1440 | 1406 |
| LMArena Chinese | 1475 | 1449 |
| LMArena French | 1466 | 1403 |
| LMArena German | 1456 | 1413 |
| LMArena Korean | 1416 | 1378 |
| LMArena Russian | 1457 | 1404 |
| LMArena Spanish | 1447 | 1447 |
| LMArena Japanese | 1405 | — |
Instruction Following Too close to call
Grok 4.20 Multi-Agent: 74.8 (#84), Kimi K2.5 Instant: 75.3 (#65)
| Benchmark | Grok 4.20 Multi-Agent | Kimi K2.5 Instant |
|---|---|---|
| LMArena Instruction Following | 1420 | 1430 |
Long Context Too close to call
Grok 4.20 Multi-Agent: 43.7 (#88), Kimi K2.5 Instant: 43.9 (#83)
| Benchmark | Grok 4.20 Multi-Agent | Kimi K2.5 Instant |
|---|---|---|
| LMArena Longer Query | 1431 | 1435 |
Writing & Preference Grok 4.20 Multi-Agent leads
Grok 4.20 Multi-Agent: 64.0 (#59), Kimi K2.5 Instant: 60.6 (#95)
| Benchmark | Grok 4.20 Multi-Agent | Kimi K2.5 Instant |
|---|---|---|
| LMArena Text | 1450 | 1420 |
| LMArena Creative Writing | 1436 | 1381 |
| LMArena Multi-Turn | 1452 | 1427 |
Frequently asked questions
Is Grok 4.20 Multi-Agent better than Kimi K2.5 Instant?
Grok 4.20 Multi-Agent is the stronger model overall, scoring 46.2 to 43.6 on the Noometry Index.
Is Grok 4.20 Multi-Agent or Kimi K2.5 Instant better for coding?
They score almost the same on coding (43.0 vs 42.6); test both on your own repository before choosing.
How many benchmarks do Grok 4.20 Multi-Agent and Kimi K2.5 Instant share?
17 benchmarks have published results for both models. Grok 4.20 Multi-Agent has 20 scored results on Noometry and Kimi K2.5 Instant has 18.