LongCat-2.5

meituan/longcat-2.5 is Meituan's natively multimodal agentic model: a sparse mixture-of-experts with 1.6T total parameters and about 48B active, a 1M-token context window, and up to 262,144 output tokens. It reads text and images and answers in text. Meituan built it for long-horizon agentic work, agentic coding, and visual coding such as creative design and 3D tasks. It replaces meituan/longcat-2.5-preview; the old id still resolves here. LongCat's limited-time rate is $0.30 / 1M input, $0.006 cached read and $1.20 / 1M output. 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"),
  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",
  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","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"

More: AI SDK · OpenAI SDK · coding agents.