GPT-5.6 Luna API

OpenAI's fastest and most cost-efficient GPT-5.6 model, built for high-volume, latency-sensitive workloads
Context
1M tokens
Input
$1.3 / 1M
Output
$7.8 / 1M
Released
Jul 9, 2026

How to use GPT-5.6 Luna API

Install any OpenAI-compatible SDK, point it at api.aimlapi.com/v1, and set the model to openai/gpt-5.6-luna.

import requests

r = requests.post(
   "https://api.aimlapi.com/v1/chat/completions",
   headers={"Authorization": "Bearer " + AIMLAPI_KEY},
   json={
     "model": "openai/gpt-5.6-luna",
     "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": "openai/gpt-5.6-luna",
   "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":"openai/gpt-5.6-luna","messages":[{"role":"user","content":"Hello!"}]}'

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

GPT-5.6 Luna API Pricing

TypePrice
Input
$1.3 / 1M tokens
Output
$7.8 / 1M tokens

Prompt caching: cache reads get a 90% discount, cache writes are billed at 1.25x input rate. Free credits on signup.

GPT-5.6 Luna vs other models

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