Aion-3.0 API

Aion-3.0 is a multi-model roleplaying and storytelling system from AionLabs, built on the GLM
Context
131K tokens
Input
$3.9 / 1M
Output
$7.8 / 1M
Released
Jul 7, 2026

How to use Aion-3.0 API

Install any OpenAI-compatible SDK, point it at api.aimlapi.com/v1, and set the model to aion-labs/aion-3.0.
import requests

r = requests.post(
    "https://api.aimlapi.com/v1/chat/completions",
    headers={"Authorization": "Bearer " + AIMLAPI_KEY},
    json={
      "model": "aion-labs/aion-3.0",
      "messages": [
        {
          "role": "user",
          "content": "Hello!"
        }
      ]
    },
)
print(r.json())
const r = await fetch("https://api.aimlapi.com/v1/chat/completions", {
  method: "POST",
  headers: {
    Authorization: `Bearer ${process.env.AIMLAPI_KEY}`,
    "Content-Type": "application/json",
  },
  body: JSON.stringify({
    "model": "aion-labs/aion-3.0",
    "messages": [
      {
        "role": "user",
        "content": "Hello!"
      }
    ]
  }),
});
console.log(await r.json());
curl -X POST https://api.aimlapi.com/v1/chat/completions \
  -H "Authorization: Bearer $AIMLAPI_KEY" \
  -H "Content-Type: application/json" \
  -d '{"model":"aion-labs/aion-3.0","messages":[{"role":"user","content":"Hello!"}]}'

OpenAI-compatible — swap the base URL and it works with your existing SDK.

Aion-3.0 API Pricing

TypePrice
Input
$3.9 / 1M
Output
$7.8 / 1M
Cached input
$0.975 / 1M

Aion-3.0 has separate cache-read pricing at $0.75 per 1M tokens, and one source also shows a free tier for use through Puter.js with a user-pays option for developers.

Aion-3.0 vs other models

ModelInputOutputContextBest for
Aion-3.0
This page
$3.9 / 1M
$7.8 / 1M
131K tokens
Agentic workflows and structured output
$5.2 / 1M
$10.4 / 1M
131K tokens
Reasoning + agents
$0.06877 / 1M
$0.13754 / 1M
131K tokens
Reasoning + agents
$1.03155 / 1M
$1.65048 / 1M
131K tokens
Reasoning + agents

Start building with Aion-3.0

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