# Longcat Flash Chat vs o1

> Longcat Flash Chat is the stronger model overall, scoring 42.1 to 40.9 on the Noometry Index.

- Canonical page: https://noometry.com/compare/longcat-flash-chat-vs-o1
- Last updated: 2026-10-10
- Shared benchmarks: 17

## Summary

- They share 17 benchmarks with published results for both. Longcat Flash Chat scores higher in 3 categories and o1 in 5 categories; 6 gaps are clear of the uncertainty.
- The widest gap is in reasoning, where o1 leads 27.9 to 19.0.
- Longcat Flash Chat has downloadable open weights; the other is API-only.

## Snapshot

| | Longcat Flash Chat | o1 |
|---|---|---|
| Provider | Meituan | OpenAI |
| Noometry Index | 42.1 | 40.9 |
| Rank | 120 | 143 |
| Context | — | 200K |
| Input $/M | — | $15 |
| Output $/M | — | $60 |
| Weights | Open | Proprietary |

## Coding

- Longcat Flash Chat: 43.5 (#87)
- o1: 46.1 (#70)

| Benchmark | Longcat Flash Chat | o1 |
|---|---|---|
| LMArena Coding | 1471 | 1367 |
| Aider Polyglot | — | 61.7% |
| WeirdML | — | 47.6% |
| LiveBench Coding | — | 69.7% |
| CadEval | — | 56% |
| HumanEval+ | — | 89% |
| MBPP+ | — | 80.2% |

## Agentic & Tool Use

- Longcat Flash Chat: —
- o1: 24.6 (#117)

| Benchmark | Longcat Flash Chat | o1 |
|---|---|---|
| Cybench | — | 10% |
| METR Time Horizons | — | 51.1% |

## Reasoning

- Longcat Flash Chat: 19.0 (#272)
- o1: 27.9 (#111)

| Benchmark | Longcat Flash Chat | o1 |
|---|---|---|
| LMArena Hard Prompts | 1440 | 1371 |
| SimpleBench | — | 41.7% |
| Kagi LLM Benchmark | 43.9% | — |
| NYT Connections (extended) | 17.7% | — |
| ARC-AGI-1 | — | 30.7% |
| Chess Puzzles | — | 15% |
| EnigmaEval | — | 5.7% |
| LiveBench Reasoning | — | 91.6% |
| DTBench | — | 74.7% |
| LiveBench Data Analysis | — | 65.5% |
| LMCA | — | 22.3% |
| Epoch Capabilities Index | — | 141.91 |
| LiveBench | — | 75.7% |

## Math

- Longcat Flash Chat: 39.4 (#107)
- o1: 36.1 (#175)

| Benchmark | Longcat Flash Chat | o1 |
|---|---|---|
| LMArena Math | 1442 | 1388 |
| FrontierMath (Tiers 1-3) | — | 14.7% |
| OTIS Mock AIME 2024-2025 | — | 73.3% |
| LiveBench Math | — | 80.3% |
| MATH Level 5 | — | 94.7% |
| FrontierMath (Feb 2025 set) | — | 9.3% |

## Knowledge

- Longcat Flash Chat: 40.6 (#116)
- o1: 41.5 (#110)

| Benchmark | Longcat Flash Chat | o1 |
|---|---|---|
| LMArena Expert | 1454 | 1361 |
| GPQA Diamond | — | 76.8% |
| Humanity's Last Exam | — | 8% |
| SimpleQA Verified | — | 41.1% |
| Confabulations | — | 11.7% |

## Multimodal

- Longcat Flash Chat: —
- o1: 34.2 (#93)

| Benchmark | Longcat Flash Chat | o1 |
|---|---|---|
| LMArena Vision | — | 1168 |
| GeoBench | — | 80% |
| VPCT | — | 37% |
| SpatialViz-Bench | — | 41.4% |

## Multilingual

- Longcat Flash Chat: 51.9 (#101)
- o1: 48.6 (#142)

| Benchmark | Longcat Flash Chat | o1 |
|---|---|---|
| LMArena Non-English | 1404 | 1358 |
| LMArena Chinese | 1465 | 1394 |
| LMArena French | 1456 | 1344 |
| LMArena German | 1408 | 1337 |
| LMArena Japanese | 1373 | 1346 |
| LMArena Korean | 1371 | 1396 |
| LMArena Russian | 1395 | 1356 |
| LMArena Spanish | 1445 | 1345 |

## Instruction Following

- Longcat Flash Chat: 74.4 (#96)
- o1: 74.8 (#86)

| Benchmark | Longcat Flash Chat | o1 |
|---|---|---|
| LMArena Instruction Following | 1411 | 1367 |
| LiveBench Instruction Following | — | 81.5% |

## Long Context

- Longcat Flash Chat: 43.5 (#93)
- o1: 50.3 (#9)

| Benchmark | Longcat Flash Chat | o1 |
|---|---|---|
| LMArena Longer Query | 1425 | 1378 |
| Fiction.LiveBench | — | 83.3% |

## Writing & Preference

- Longcat Flash Chat: 61.0 (#91)
- o1: 55.6 (#144)

| Benchmark | Longcat Flash Chat | o1 |
|---|---|---|
| LMArena Text | 1427 | 1366 |
| LMArena Creative Writing | 1388 | 1348 |
| LMArena Multi-Turn | 1418 | 1369 |
| Short-Story Creative Writing | — | 70.2% |
| LiveBench Language | — | 65.4% |

## FAQ

### Is Longcat Flash Chat better than o1?

Longcat Flash Chat is the stronger model overall, scoring 42.1 to 40.9 on the Noometry Index.

### Is Longcat Flash Chat or o1 better for coding?

o1 scores higher on coding benchmarks: 46.1 versus 43.5 in the Noometry coding category.

### How many benchmarks do Longcat Flash Chat and o1 share?

17 benchmarks have published results for both models. Longcat Flash Chat has 19 scored results on Noometry and o1 has 52.