Fallback models

curl https://api.aireserve.com/v1/chat/completions \
  -H "Authorization: Bearer $AIRESERVE_API_KEY" \
  -H "Content-Type: application/json" \
  -d '{
    "models": ["claude-fable-5-1", "gpt-6-astra", "kimi-k3-fireworks"],
    "messages": [{ "role": "user", "content": "hello" }]
  }'

from openai import OpenAI

client = OpenAI(base_url="https://api.aireserve.com/v1", api_key=os.environ["AIRESERVE_API_KEY"])

res = client.chat.completions.with_raw_response.create(
    model="claude-fable-5-1",
    messages=[{"role": "user", "content": "hello"}],
    extra_body={"fallbacks": ["gpt-6-astra", "kimi-k3-fireworks"]},
)
served = res.headers.get("x-aireserve-served-model")  # set only when a fallback answered
print(res.parse().choices[0].message.content, served)

import OpenAI from "openai";

const client = new OpenAI({ baseURL: "https://api.aireserve.com/v1", apiKey: process.env.AIRESERVE_API_KEY });

const params = {
  model: "claude-fable-5-1",
  messages: [{ role: "user", content: "hello" }],
  fallbacks: ["gpt-6-astra", "kimi-k3-fireworks"], // gateway extension, forwarded as-is
} as OpenAI.Chat.ChatCompletionCreateParamsNonStreaming;

const { data, response } = await client.chat.completions.create(params).withResponse();

const served = response.headers.get("x-aireserve-served-model"); // null unless a fallback answered
console.log(data.choices[0].message.content, served);