LongCat-2.5-Preview

meituan/longcat-2.5-preview is Meituan's new flagship preview: a sparse mixture-of-experts model with ~1.6T total parameters and ~48B active, a 1M-token context window, and 128K max output. This release adds image understanding, stronger coding, and an optional thinking mode — built for long-horizon agentic work across terminals, browsers, and dev tools. LongCat list rates are $0.75 / 1M input and $2.95 / 1M output ($0.015 cached read; a limited-time discount runs $0.30 / $1.20). AnyRouter bills $0 on this route — it is BYOK-only, so bring a sk-... key from LongCat and add it under Dashboard → BYOK.

• App code — Vercel AI SDK or OpenAI SDK.
• Coding agent — anyr claude / anyr opencode / anyr codex (playbook).
• No code — playground.

Try it in the Vercel AI SDK. createAnyRouter() reads ANYROUTER_API_KEY:

import { createAnyRouter } from "@anyr/ai-sdk-provider"
import { generateText } from "ai"

const anyrouter = createAnyRouter()

const { text } = await generateText({
  model: anyrouter("meituan/longcat-2.5-preview"),
  prompt: "Summarize this diff in three bullets.",
})
console.log(text)

Already on the OpenAI SDK? OpenAI SDK playbook:

import OpenAI from "openai"

const client = new OpenAI({
  baseURL: "https://anyrouter.dev/api/v1",
  apiKey: process.env.ANYROUTER_API_KEY,
})

const res = await client.chat.completions.create({
  model: "meituan/longcat-2.5-preview",
  messages: [{ role: "user", content: "Hello" }],
})
console.log(res.choices[0]?.message.content)

curl https://anyrouter.dev/api/v1/chat/completions \
  -H "Authorization: Bearer $ANYROUTER_API_KEY" \
  -H "Content-Type: application/json" \
  -d '{"model":"meituan/longcat-2.5-preview","messages":[{"role":"user","content":"Hello"}]}'

Or launch a coding agent through the anyr CLI:

curl -fsSL https://anyrouter.dev/setup.sh | bash
anyr login
anyr claude --model "meituan/longcat-2.5-preview"

More: AI SDK · OpenAI SDK · coding agents.