LongCat 2.0 Thinking is a reasoning-focused variant in Meituan's LongCat family, hosted by NanoGPT under the model identifier longcat-2.0:thinking and listed as released on the same date in mid-2026. It is positioned as a closed-weights, API-delivered model that supports extended-context workloads, with NanoGPT's router exposing it through an OpenAI-compatible /chat/completions interface. NanoGPT is one of several providers carrying the underlying LongCat 2.0 family, and the :thinking variant is the configuration explicitly tuned for chain-of-thought style responses and tool invocation within that lineup.

In practical terms, the model is aimed at developers building agents and assistants that need to combine long document handling with structured tool use and reasoning. The NanoGPT-hosted :thinking variant advertises reasoning, tool calling, and temperature control as enabled, while the broader catalog of capability flags lives at the provider layer. Its very large context window on NanoGPT makes it a reasonable fit for tasks such as multi-document analysis, codebase navigation, and long-running agentic workflows where sustained reasoning over substantial input is required, all delivered through a familiar chat completions endpoint.