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AnyRouter
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Uptime

Keep an agent up when a provider goes down

List backup models in one request. If the primary model's providers are down or rate-limited, AnyRouter tries the next model.

Model fallbacks guideRoutinganyrouter/auto

What this is for

An agent pinned to one model stops mid-task during a provider outage or a 429 burst. Retry loops in your code add latency and still hit the same provider.

How the request flows

Your agent
AnyRouter
Primary modelmodel
Backup modelmodels[0]

Steps, then copy

  1. 1.Keep your primary model in model.
  2. 2.Add backup ids in models, in the order you want them tried. Fallbacks run on /api/v1/chat/completions.
  3. 3.Read the model field in the response to see which one answered. Or use anyrouter/auto and let AnyRouter pick a healthy model.
curl · models fallback
bash
curl https://anyrouter.dev/api/v1/chat/completions \
  -H "Authorization: Bearer $ANYROUTER_API_KEY" \
  -H "Content-Type: application/json" \
  -d '{
    "model": "openai/gpt-5.4-mini",
    "models": ["anthropic/claude-sonnet-4-6", "z-ai/glm-4.7-flash"],
    "messages": [{ "role": "user", "content": "Plan the next step." }]
  }'
AI SDK
ts
import { createAnyRouter } from "@anyr/ai-sdk-provider"
import { generateText } from "ai"

const anyrouter = createAnyRouter()

const { text } = await generateText({
  model: anyrouter("openai/gpt-5.4-mini"),
  prompt: "Plan the next step.",
  providerOptions: {
    anyrouter: {
      extraBody: { models: ["anthropic/claude-sonnet-4-6", "z-ai/glm-4.7-flash"] },
    },
  },
})
console.log(text)

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Model fallbacks guideStart free

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