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LongCat Flash Thinking 2601

LongCat Flash Thinking 2601 is Meituan's January 15, 2026 upgrade to the reasoning model series. It introduces parallel multi-path thinking, noise-resistant tool calling, and a τ²-Bench score of 88.2 with an AIME-25 score of 100.0.

ReasoningTool Use
index.ts
import { streamText } from 'ai'


const result = streamText({
  model: 'meituan/longcat-flash-thinking-2601',
  prompt: 'Why is the sky blue?'
})
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ZDR
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Release Date
meituan/longcat-flash-chat
128K
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09/01/2025