LongCat-Flash-Chat
Model overview
LongCat-Flash-Chat
Meituan LongCat-Flash-Chat open MoE model with parameters from the official technical article.
general LLMcodingreasoningchatcode generationlocal inferenceevaluation
Representative version
LongCat-Flash-Chat
| Company | Meituan |
|---|---|
| Release | 2025-08-29 |
| Release type | Model release |
| Parameters | 560B / 27B active |
| Architecture | MoE or sparse architecture; exact architecture not separately normalized. |
| Context | 262,144 |
| Input modalities | text / code |
| Output modalities | text / code |
| Tool use / function calling | Tool use: Not disclosed; Function calling: Not disclosed |
| Structured output / reasoning | Confirmed: Reasoning |
| Vision / audio / video | Vision: Not disclosed; Audio: Not disclosed; Video: Not disclosed |
| Open weights / License | Weights available / MIT (license source pending verification) meituan-longcat-flash-chat-phase-3-5 · License source pending verification |
| Vendor API | No vendor API offered Meituan LongCat-Flash-Chat announcementmeituan-longcat-flash-chat-phase-3-5 · 2025-08-29 |
| OpenRouter | Not separately listed on OpenRouter |
| Pricing | No reliable public source |
| Benchmark | LMArena 3 rows |
| Public signals | 1 community discussion / 1 activity snapshot |
| Use cases | assistant chat / code generation / local inference / research evaluation |
| Claim evidence | Release event / Model specifications / Weight checkpointMeituan LongCat-Flash-Chat announcementLongCat-Flash-Chat · 2025-08-29 · LongCat-Flash-Chat · LongCat-Flash-Chat · LongCat-Flash-Chat |
OpenRouter
Pricing / context / availability
| OpenRouter | Not separately listed on OpenRouter |
|---|---|
| OpenRouter listing | Not separately listed in the current OpenRouter public list |
| Mapped version | LongCat-Flash-Chat meituan-longcat-flash-chat-phase-3-5 |
| Pricing | No reliable public source |
| Context | 262144 |
| Speed/Latency | No reliable public source |
| Snapshot time | 2026-08-11T06:28:09.895Z |
| Source | View source |
Benchmark
Ranking evidence
| Source | Task | Rank | Score | Sample | Time | Link |
|---|---|---|---|---|---|---|
| LMArena | Coding | 65 | 1,474.49 | 2,235 | 2026-05-07 | View source |
| LMArena | Reasoning / hard prompts | 98 | 1,426.84 | 5,586 | 2026-05-07 | View source |
| LMArena | Text overall | 108 | 1,401.29 | 11,409 | 2026-05-07 | View source |
Verified limitations
Usage boundaries
- No verified usage, ranking, call-volume, token-consumption, heat, download, or OpenRouter metric is populated.
Public activity counters
Hugging Face model-card activity snapshot
| Platform | Entry | Last-month downloads | Current likes | Current Spaces | Time | Source |
|---|---|---|---|---|---|---|
| huggingface Current HF activity snapshot | meituan-longcat/LongCat-Flash-Chat | 52,222 | 537 | 8 | View source |
Downloads are Hugging Face's trailing-month counter; likes and Spaces are snapshots at collection time.
Missing public information
Public information not yet available
Not listed on OpenRouterNo linkable model-specific reviewSpeed/latency not disclosed