Meituan

Meituan is the Chinese consumer platform (food delivery, travel, local services) whose AI lab published one of the more consequential open-source releases of 2026. On June 30, 2026 Meituan open sourced LongCat-2.0, a 1.6 trillion parameter mixture-of-experts model with dynamic activation of 33 to 56 billion parameters per token, native 1 million token context, and a purpose-built agentic coding orientation. It was the first trillion-parameter release to complete full training and inference entirely on a 50,000-card domestic Chinese compute cluster, a milestone for building frontier AI without leading-edge Western silicon. Weights ship under MIT on GitHub and Hugging Face. Meituan reports 59.5 on SWE-Bench Pro (self-reported), ahead of Gemini 3.1 Pro, GPT-5.5, and Claude Opus 4.6 by their measure; independent verification is pending. A preview version had been quietly running on OpenRouter and longcat.ai for weeks before the announcement, ranking among the top three models globally by call volume during that stealth window.