# Grok 4.3 vs Longcat Flash Chat

> Grok 4.3 is the stronger model overall, scoring 43.6 to 41.5 on the Noometry Index.

- Canonical page: https://noometry.com/compare/grok-4-3-vs-longcat-flash-chat
- Last updated: 2026-10-10
- Shared benchmarks: 18

## Summary

- They share 18 benchmarks with published results for both. Grok 4.3 scores higher in 3 categories and Longcat Flash Chat in 5 categories; 8 gaps are clear of the uncertainty.
- The widest gap is in reasoning, where Grok 4.3 leads 34.9 to 18.3.
- The biggest single-benchmark swing is NYT Connections (extended): 55.2% for Grok 4.3 and 17.7% for Longcat Flash Chat.
- Longcat Flash Chat has downloadable open weights; the other is API-only.

## Snapshot

| | Grok 4.3 | Longcat Flash Chat |
|---|---|---|
| Provider | xAI | Meituan |
| Noometry Index | 43.6 | 41.5 |
| Rank | 80 | 121 |
| Context | 1M | — |
| Input $/M | $1.25 | — |
| Output $/M | $2.50 | — |
| Weights | Proprietary | Open |

## Coding

- Grok 4.3: 41.3 (#117)
- Longcat Flash Chat: 42.9 (#85)

| Benchmark | Grok 4.3 | Longcat Flash Chat |
|---|---|---|
| LMArena Coding | 1415 | 1471 |
| LMArena WebDev | 1357 | — |
| SciCode | 47.3% | — |
| WeirdML | 49.9% | — |
| ALE-Bench | 944.17 | — |

## Agentic & Tool Use

- Grok 4.3: 27.6 (#93)
- Longcat Flash Chat: —

| Benchmark | Grok 4.3 | Longcat Flash Chat |
|---|---|---|
| GDP.pdf | 8% | — |
| LMArena Search | 1165 | — |
| Vending-Bench 2 | 35.26 | — |

## Reasoning

- Grok 4.3: 34.9 (#60)
- Longcat Flash Chat: 18.3 (#267)

| Benchmark | Grok 4.3 | Longcat Flash Chat |
|---|---|---|
| NYT Connections (extended) | 55.2% | 17.7% |
| LMArena Hard Prompts | 1397 | 1440 |
| Kagi LLM Benchmark | — | 43.9% |
| CritPt | 8% | — |
| Chess Puzzles | 25% | — |
| DTBench | 90.7% | — |
| LMCA | 38.3% | — |
| Epoch Capabilities Index | 149.13 | — |
| ForecastBench | 60.3 | — |

## Math

- Grok 4.3: 45.8 (#60)
- Longcat Flash Chat: 36.6 (#107)

| Benchmark | Grok 4.3 | Longcat Flash Chat |
|---|---|---|
| LMArena Math | 1388 | 1441 |
| FrontierMath (Tiers 1-3) | 42.8% | — |
| FrontierMath Tier 4 | 14.6% | — |
| OTIS Mock AIME 2024-2025 | 93.3% | — |
| ProofBench | 11% | — |

## Knowledge

- Grok 4.3: 52.5 (#57)
- Longcat Flash Chat: 40.0 (#111)

| Benchmark | Grok 4.3 | Longcat Flash Chat |
|---|---|---|
| LMArena Expert | 1385 | 1454 |
| GPQA Diamond | 88.8% | — |
| SimpleQA Verified | 33.2% | — |

## Multimodal

- Grok 4.3: 31.6 (#96)
- Longcat Flash Chat: —

| Benchmark | Grok 4.3 | Longcat Flash Chat |
|---|---|---|
| LMArena Vision | 1231 | — |
| Blueprint-Bench 2 | 0% | — |

## Multilingual

- Grok 4.3: 50.7 (#114)
- Longcat Flash Chat: 52.1 (#95)

| Benchmark | Grok 4.3 | Longcat Flash Chat |
|---|---|---|
| LMArena Non-English | 1385 | 1404 |
| LMArena Chinese | 1423 | 1465 |
| LMArena French | 1412 | 1457 |
| LMArena German | 1395 | 1409 |
| LMArena Japanese | 1379 | 1373 |
| LMArena Korean | 1357 | 1372 |
| LMArena Russian | 1399 | 1396 |
| LMArena Spanish | 1402 | 1445 |

## Instruction Following

- Grok 4.3: 72.3 (#135)
- Longcat Flash Chat: 74.6 (#92)

| Benchmark | Grok 4.3 | Longcat Flash Chat |
|---|---|---|
| LMArena Instruction Following | 1366 | 1411 |

## Long Context

- Grok 4.3: 42.5 (#118)
- Longcat Flash Chat: 43.5 (#89)

| Benchmark | Grok 4.3 | Longcat Flash Chat |
|---|---|---|
| LMArena Longer Query | 1393 | 1425 |

## Writing & Preference

- Grok 4.3: 58.6 (#112)
- Longcat Flash Chat: 61.2 (#88)

| Benchmark | Grok 4.3 | Longcat Flash Chat |
|---|---|---|
| LMArena Text | 1397 | 1427 |
| LMArena Creative Writing | 1380 | 1388 |
| LMArena Multi-Turn | 1406 | 1418 |
| EQ-Bench 4 | 1075 | — |

## FAQ

### Is Grok 4.3 better than Longcat Flash Chat?

Grok 4.3 is the stronger model overall, scoring 43.6 to 41.5 on the Noometry Index.

### Is Grok 4.3 or Longcat Flash Chat better for coding?

Longcat Flash Chat scores higher on coding benchmarks: 42.9 versus 41.3 in the Noometry coding category.

### How many benchmarks do Grok 4.3 and Longcat Flash Chat share?

18 benchmarks have published results for both models. Grok 4.3 has 40 scored results on Noometry and Longcat Flash Chat has 19.