# Longcat Flash Chat vs Solar Pro4

> Longcat Flash Chat and Solar Pro4 score almost the same on the Noometry Index (42.1 vs 42.1), so choose on price, context window or the category you care about most.

- Canonical page: https://noometry.com/compare/longcat-flash-chat-vs-solar-pro4
- Last updated: 2026-10-10
- Shared benchmarks: 17

## Summary

- They share 17 benchmarks with published results for both. Longcat Flash Chat scores higher in 7 categories and Solar Pro4 in 1 category; 6 gaps are clear of the uncertainty.
- The widest gap is in reasoning, where Solar Pro4 leads 28.5 to 19.0.
- Longcat Flash Chat has downloadable open weights; the other is API-only.

## Snapshot

| | Longcat Flash Chat | Solar Pro4 |
|---|---|---|
| Provider | Meituan | Upstage |
| Noometry Index | 42.1 | 42.1 |
| Rank | 120 | 121 |
| Context | — | 524K |
| Input $/M | — | $0.30 |
| Output $/M | — | $1.20 |
| Weights | Open | Proprietary |

## Coding

- Longcat Flash Chat: 43.5 (#87)
- Solar Pro4: 40.1 (#149)

| Benchmark | Longcat Flash Chat | Solar Pro4 |
|---|---|---|
| LMArena Coding | 1471 | 1437 |
| LMArena WebDev | — | 1371 |

## Reasoning

- Longcat Flash Chat: 19.0 (#272)
- Solar Pro4: 28.5 (#104)

| Benchmark | Longcat Flash Chat | Solar Pro4 |
|---|---|---|
| LMArena Hard Prompts | 1440 | 1399 |
| Kagi LLM Benchmark | 43.9% | — |
| NYT Connections (extended) | 17.7% | — |

## Math

- Longcat Flash Chat: 39.4 (#107)
- Solar Pro4: 38.8 (#128)

| Benchmark | Longcat Flash Chat | Solar Pro4 |
|---|---|---|
| LMArena Math | 1442 | 1416 |

## Knowledge

- Longcat Flash Chat: 40.6 (#116)
- Solar Pro4: 39.8 (#129)

| Benchmark | Longcat Flash Chat | Solar Pro4 |
|---|---|---|
| LMArena Expert | 1454 | 1427 |

## Multilingual

- Longcat Flash Chat: 51.9 (#101)
- Solar Pro4: 48.7 (#139)

| Benchmark | Longcat Flash Chat | Solar Pro4 |
|---|---|---|
| LMArena Non-English | 1404 | 1361 |
| LMArena Chinese | 1465 | 1415 |
| LMArena French | 1456 | 1397 |
| LMArena German | 1408 | 1364 |
| LMArena Japanese | 1373 | 1309 |
| LMArena Korean | 1371 | 1382 |
| LMArena Russian | 1395 | 1360 |
| LMArena Spanish | 1445 | 1401 |

## Instruction Following

- Longcat Flash Chat: 74.4 (#96)
- Solar Pro4: 72.7 (#132)

| Benchmark | Longcat Flash Chat | Solar Pro4 |
|---|---|---|
| LMArena Instruction Following | 1411 | 1377 |

## Long Context

- Longcat Flash Chat: 43.5 (#93)
- Solar Pro4: 42.1 (#130)

| Benchmark | Longcat Flash Chat | Solar Pro4 |
|---|---|---|
| LMArena Longer Query | 1425 | 1381 |

## Writing & Preference

- Longcat Flash Chat: 61.0 (#91)
- Solar Pro4: 56.5 (#138)

| Benchmark | Longcat Flash Chat | Solar Pro4 |
|---|---|---|
| LMArena Text | 1427 | 1386 |
| LMArena Creative Writing | 1388 | 1316 |
| LMArena Multi-Turn | 1418 | 1385 |

## FAQ

### Is Longcat Flash Chat better than Solar Pro4?

Longcat Flash Chat and Solar Pro4 score almost the same on the Noometry Index (42.1 vs 42.1), so choose on price, context window or the category you care about most.

### Is Longcat Flash Chat or Solar Pro4 better for coding?

Longcat Flash Chat scores higher on coding benchmarks: 43.5 versus 40.1 in the Noometry coding category.

### How many benchmarks do Longcat Flash Chat and Solar Pro4 share?

17 benchmarks have published results for both models. Longcat Flash Chat has 19 scored results on Noometry and Solar Pro4 has 18.