LongCat 2.5
A large language model released by Meituan that combines native visual understanding, coding capability and multi-step tool use, targeted at agentic engineering workflows and supporting text and image inputs.
Timeline (last 90 days)
LongCat 2.5's open-source weights release is described as "coming soon" and is not yet online.
Meituan fully released the LongCat 2.5 model from November 1 to 2, 2026; the model had already existed in API preview form since September 25.
LongCat 2.5 is described by Meituan as a native multimodal model for long-horizon agentic tasks.
Meituan lists LongCat 2.5 as having 1.6 trillion total parameters with about 48 billion parameters activated per token; however, reports note that these figures were carried over from the LongCat 2.0 model card, and the parameter claims are disputed.
LongCat 2.5 has a 1-million-token context window and up to 128,000 tokens of output.
LongCat 2.5 is trained on longer agent action sequences, including sequences containing failures, so that the agent learns to recover from failures and continue.
LongCat 2.5 is currently available via the LongCat Chat website (longcat.chat) and the LongCat API, which is compatible with Claude Code, Codex, and Hermes tools.
Meituan's large model LongCat 2.5 has officially launched on AI Gateway.
LongCat 2.5 integrates native visual understanding, coding capability, and multi-step tool calling.
LongCat 2.5 supports text and image inputs.
4 more timeline events
All Facts (14)
LongCat 2.5 is currently available via the LongCat Chat website (longcat.chat) and the LongCat API, which is compatible with Claude Code, Codex, and Hermes tools.
50%UnverifiedLongCat 2.5's open-source weights release is described as "coming soon" and is not yet online.
50%UnverifiedLongCat 2.5 is described by Meituan as a native multimodal model for long-horizon agentic tasks.
50%UnverifiedMeituan lists LongCat 2.5 as having 1.6 trillion total parameters with about 48 billion parameters activated per token; however, reports note that these figures were carried over from the LongCat 2.0 model card, and the parameter claims are disputed.
50%UnverifiedLongCat 2.5 has a 1-million-token context window and up to 128,000 tokens of output.
50%UnverifiedLongCat 2.5 is trained on longer agent action sequences, including sequences containing failures, so that the agent learns to recover from failures and continue.
50%UnverifiedThe information officially disclosed so far focuses on capability directions and access methods, and lacks specific benchmark data.
50%UnverifiedLongCat 2.5 integrates native visual understanding, coding capability, and multi-step tool calling.
50%UnverifiedLongCat 2.5 supports text and image inputs.
50%UnverifiedLongCat 2.5 has a context window of 1 million tokens.
50%UnverifiedCalling LongCat 2.5 in AI Gateway only requires using the model name `meituan/longcat-2.5`.
50%UnverifiedTo use LongCat 2.5 in coding agents such as Claude Code, Codex and Cursor, you first need to install the latest Vercel CLI and run `npx vercel ai-gateway setup`, then select `meituan/longcat-2.5` in the agent.
50%UnverifiedMeituan fully released the LongCat 2.5 model from November 1 to 2, 2026; the model had already existed in API preview form since September 25.
50%UnverifiedMeituan's large model LongCat 2.5 has officially launched on AI Gateway.
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