# Grok 4.20 Multi-Agent vs Longcat Flash Chat

> Grok 4.20 Multi-Agent is the stronger model overall, scoring 46.2 to 42.1 on the Noometry Index.

- Canonical page: https://noometry.com/compare/grok-4-20-multi-agent-vs-longcat-flash-chat
- Last updated: 2026-10-10
- Shared benchmarks: 18

## Summary

- They share 18 benchmarks with published results for both. Grok 4.20 Multi-Agent scores higher in 6 categories and Longcat Flash Chat in 2 categories; 3 gaps are clear of the uncertainty.
- The widest gap is in reasoning, where Grok 4.20 Multi-Agent leads 43.9 to 19.0.
- The biggest single-benchmark swing is NYT Connections (extended): 89.6% for Grok 4.20 Multi-Agent and 17.7% for Longcat Flash Chat.
- Longcat Flash Chat has downloadable open weights; the other is API-only.

## Snapshot

| | Grok 4.20 Multi-Agent | Longcat Flash Chat |
|---|---|---|
| Provider | xAI | Meituan |
| Noometry Index | 46.2 | 42.1 |
| Rank | 65 | 120 |
| Context | 1M | — |
| Input $/M | $1.25 | — |
| Output $/M | $2.50 | — |
| Weights | Proprietary | Open |

## Coding

- Grok 4.20 Multi-Agent: 43.0 (#92)
- Longcat Flash Chat: 43.5 (#87)

| Benchmark | Grok 4.20 Multi-Agent | Longcat Flash Chat |
|---|---|---|
| LMArena Coding | 1457 | 1471 |

## Agentic & Tool Use

- Grok 4.20 Multi-Agent: —
- Longcat Flash Chat: —

| Benchmark | Grok 4.20 Multi-Agent | Longcat Flash Chat |
|---|---|---|
| LMArena Search | 1204 | — |

## Reasoning

- Grok 4.20 Multi-Agent: 43.9 (#48)
- Longcat Flash Chat: 19.0 (#272)

| Benchmark | Grok 4.20 Multi-Agent | Longcat Flash Chat |
|---|---|---|
| NYT Connections (extended) | 89.6% | 17.7% |
| LMArena Hard Prompts | 1448 | 1440 |
| Kagi LLM Benchmark | — | 43.9% |

## Math

- Grok 4.20 Multi-Agent: 39.4 (#104)
- Longcat Flash Chat: 39.4 (#107)

| Benchmark | Grok 4.20 Multi-Agent | Longcat Flash Chat |
|---|---|---|
| LMArena Math | 1442 | 1442 |

## Knowledge

- Grok 4.20 Multi-Agent: 40.4 (#119)
- Longcat Flash Chat: 40.6 (#116)

| Benchmark | Grok 4.20 Multi-Agent | Longcat Flash Chat |
|---|---|---|
| LMArena Expert | 1445 | 1454 |

## Multimodal

- Grok 4.20 Multi-Agent: 40.5 (#48)
- Longcat Flash Chat: —

| Benchmark | Grok 4.20 Multi-Agent | Longcat Flash Chat |
|---|---|---|
| LMArena Vision | 1259 | — |

## Multilingual

- Grok 4.20 Multi-Agent: 54.4 (#43)
- Longcat Flash Chat: 51.9 (#101)

| Benchmark | Grok 4.20 Multi-Agent | Longcat Flash Chat |
|---|---|---|
| LMArena Non-English | 1440 | 1404 |
| LMArena Chinese | 1475 | 1465 |
| LMArena French | 1466 | 1456 |
| LMArena German | 1456 | 1408 |
| LMArena Japanese | 1405 | 1373 |
| LMArena Korean | 1416 | 1371 |
| LMArena Russian | 1457 | 1395 |
| LMArena Spanish | 1447 | 1445 |

## Instruction Following

- Grok 4.20 Multi-Agent: 74.8 (#84)
- Longcat Flash Chat: 74.4 (#96)

| Benchmark | Grok 4.20 Multi-Agent | Longcat Flash Chat |
|---|---|---|
| LMArena Instruction Following | 1420 | 1411 |

## Long Context

- Grok 4.20 Multi-Agent: 43.7 (#88)
- Longcat Flash Chat: 43.5 (#93)

| Benchmark | Grok 4.20 Multi-Agent | Longcat Flash Chat |
|---|---|---|
| LMArena Longer Query | 1431 | 1425 |

## Writing & Preference

- Grok 4.20 Multi-Agent: 64.0 (#59)
- Longcat Flash Chat: 61.0 (#91)

| Benchmark | Grok 4.20 Multi-Agent | Longcat Flash Chat |
|---|---|---|
| LMArena Text | 1450 | 1427 |
| LMArena Creative Writing | 1436 | 1388 |
| LMArena Multi-Turn | 1452 | 1418 |

## FAQ

### Is Grok 4.20 Multi-Agent better than Longcat Flash Chat?

Grok 4.20 Multi-Agent is the stronger model overall, scoring 46.2 to 42.1 on the Noometry Index.

### Is Grok 4.20 Multi-Agent or Longcat Flash Chat better for coding?

They score almost the same on coding (43.0 vs 43.5); test both on your own repository before choosing.

### How many benchmarks do Grok 4.20 Multi-Agent and Longcat Flash Chat share?

18 benchmarks have published results for both models. Grok 4.20 Multi-Agent has 20 scored results on Noometry and Longcat Flash Chat has 19.