Gemini 4 Argon
Claude Opus 5.5
Muse Wonder
MiMo-V2.6-Pro
Qwen3.8-Max
Kimi K3
GLM-5.3
GPT-5.5
ERNIE 5.1
DeepSeek-V4.1-Flash-20260910
Grok 4.20 Beta
amazon-nova-experimental-chat
Dola Seed 2.0 Pro
NVIDIA-Nemotron-3-Ultra-550B-A55B
Gemma 4 31B
Step 5 Preview
LongCat-Flash-Chat Exp
LongCat-Flash-Chat Exp is an open-weight model from Meituan. It ranks #102 of 351 on the LMArena text leaderboard with a rating of 1427.
- Developer
- Meituan
- Released
- Sep 17, 2025
- Context window
- —
- Price in / out, per 1M tokens
- —
- Weights
- Open · MIT
- Inputs
- —
- Reasoning
- —
- Tool use
- —
The rating LMArena published at each update since Sep 17, 2025. Ratings move as votes come in and new models join.
LMArena, by category
| Leaderboard | Rating | Rank | Votes |
|---|---|---|---|
| TextLMArena | 1427 | 102 / 351 | 29.3K |
| CodingLMArena | 1471 | 68 / 346 | 8.2K |
| MathLMArena | 1441 | 81 / 339 | 686 |
| Creative writingLMArena | 1388 | 121 / 349 | 4.4K |
| Instruction followingLMArena | 1411 | 105 / 351 | 9.6K |
| Hard promptsLMArena | 1440 | 97 / 351 | 18.7K |
| Multi-turnLMArena | 1418 | 120 / 349 | 5.2K |
| Long queriesLMArena | 1425 | 103 / 330 | 11.5K |
| ExpertLMArena | 1454 | 78 / 305 | 2.8K |
| Legal and governmentIndustries | 1417 | 136 / 325 | 777 |
| Medicine and healthcareIndustries | 1459 | 53 / 325 | 662 |
| Business and financeIndustries | 1428 | 86 / 344 | 2.1K |
| ChineseLanguages | 1465 | 97 / 328 | 2K |
| SpanishLanguages | 1445 | 73 / 249 | 402 |
| GermanLanguages | 1408 | 117 / 261 | 298 |
| FrenchLanguages | 1456 | 73 / 252 | 184 |
| JapaneseLanguages | 1375 | 107 / 236 | 263 |
LMArena, CC BY 4.0, as of Oct 22, 2026. Where a model is rated at several effort levels, its best is shown (LongCat-Flash-Chat Exp (2602), LongCat-Flash-Chat).
Compare LongCat-Flash-Chat Exp
Meituan
The delivery giant’s LongCat models are open, fast mixture-of-experts models. Founded 2010, based in Beijing. longcat.ai
Questions
Who makes LongCat-Flash-Chat Exp?
LongCat-Flash-Chat Exp is made by Meituan, founded 2010 and based in Beijing.
How does LongCat-Flash-Chat Exp rank?
#102 of 351 on LMArena’s text leaderboard, rated 1427 (95% interval 1422–1431) from 29,275 votes, as of Oct 22, 2026.
Is LongCat-Flash-Chat Exp open source?
LongCat-Flash-Chat Exp has open weights under the MIT license.