LongCat-Flash
by Meituan
· LongCat family · released Sep 20, 2025
Open weights
Active
Meituan's first open-source MoE foundation model (~560B total, 27B active), competitive with GLM-4.5 and Qwen3 on coding and agent benchmarks. It marked Meituan's entry into open-weight frontier LLMs.
This model has no first-party API. Open-weight release: self-host from published weights.
Specifications
| Model type | Text LLM |
|---|---|
| Architecture | MoE |
| Parameters | 560 (27 active) |
| Context window | 128K tokens |
| Max output | Not disclosed tokens |
| Knowledge cutoff | Not disclosed |
| License | MIT License |
| Modalities | Text input Text output |
| Tags | Agentic Reasoning Tool use |
| End of life | Not disclosed |
| Last verified | Not disclosed |