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 | Not disclosed |
| Structured output / reasoning | Confirmed: Reasoning |
| Vision / audio / 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 | 2 community discussions / 1 activity snapshot |
| Use cases | assistant chat / code generation / local inference / research evaluation |
| Claim evidence | Release / model specs / weightsMeituan LongCat-Flash-Chat announcementLongCat-Flash-Chat · 2025-08-29 |
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 | 2026-07-15T20:11:41.551Z |
| 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 |
Public activity counters
Cumulative Hugging Face model-card downloads / likes / spaces
| Platform | Entry | Downloads | Likes | Spaces | Time | Source |
|---|---|---|---|---|---|---|
| huggingface | meituan-longcat/LongCat-Flash-Chat | 78,385 | 537 | 8 | 2026-07-15T20:11:41.551Z | View source |
Evidence gaps
Public display boundary
OpenRouter not separately verifiedNo linkable real reviewSpeed/latency not disclosed