The developer says it has 1.6 trillion parameters, with roughly 48 billion activated per processed token. Meituan highlights visual understanding, work on complex codebases and complete software projects.
The API documentation distinguishes this release from LongCat-2.5-Preview, available since 25 September. GitHub and Hugging Face releases are still planned: service access does not mean the model weights are downloadable.
The claimed capability gains come from Meituan; the consulted sources do not provide an independent evaluation of the model.