Meituan
Meituan has officially released and open-sourced LongCat-Flash-Chat, which utilizes an innovative Mixture of Experts (MoE) and "zero-computation expert" mechanism to achieve a total of 560B parameters, while only activating around 27B parameters per token as needed. At the same time, end-to-end optimization for agents (including a self-built evaluation set and multi-agent trajectory data) significantly enhances its performance in tool usage and complex task orchestration.
Meituan has officially released and open-sourced LongCat-Flash-Chat, which utilizes an innovative Mixture of Experts (MoE) and "zero-computation expert" mechanism to achieve a total of 560B parameters, while only activating around 27B parameters per token as needed. At the same time, end-to-end optimization for agents (including a self-built evaluation set and multi-agent trajectory data) significantly enhances its performance in tool usage and complex task orchestration.
On AIHubMix, LongCat-Flash-Chat costs $0.14 per million input tokens and $0.7 per million output tokens.
LongCat-Flash-Chat is available through the AIHubMix unified API. The API is OpenAI-compatible: point your OpenAI SDK at https://aihubmix.com/v1, use your AIHubMix API key, and set the model name to LongCat-Flash-Chat — no other code changes needed.
LongCat-Flash-Chat is developed by Meituan. AIHubMix aggregates it alongside models from other providers behind one API and one bill.
LongCat-Flash-Chat was released on November 5, 2025 by Meituan.
Designed for agent development scenarios, it natively supports tool invocation…
Use LongCat-Flash-Chat via the AIHubMix unified API — one interface for every major LLM.