LongCat 2.5 Preview Free

LongCat 2.5 Preview Free is the newest entry in Meituan's LongCat family, positioned as a multimodal reasoning model purpose-built for coding and agent-style tasks. It accepts images as part of its input alongside text, reflecting Meituan's continued push into multimodal understanding for software and tool-driven workflows. The preview tag in the model name signals an early-stage release that is likely to evolve toward a stable successor once real-world feedback is absorbed.

At the practical level, LongCat 2.5 Preview Free is engineered for long-horizon work, pairing a 1,000,000-token context window with a 131,072-token output ceiling that lets it ingest large codebases, multi-file repositories, or extended agent traces in a single pass. It exposes reasoning, tool calling, and temperature control out of the box, with structured-output support not currently indicated in its capability profile. Weights remain closed, so users interact with it through hosted endpoints rather than self-hosting. This combination makes the preview best suited for developers experimenting with long-context coding assistants, multimodal reasoning pipelines, and agent prototypes that benefit from very large working memory.