How do I use GPT-5.6 Luna Pro through YepAPI?

Sign up for a free API key, then send requests to the /v1/ai/chat endpoint.

OpenAIText Generation/v1/ai/chatReasoning

GPT-5.6 Luna Pro

Access GPT-5.6 Luna Pro through one API key. OpenAI GPT-5.6 Luna Pro Reasoning Mode.

GPT-5.6 Luna Pro is the same underlying model as GPT-5.6 Luna, served with OpenAI's reasoning mode set to pro. Use GPT-5.6 Luna Pro for the steps where correctness is worth the wait — final reviews, hard debugging, planning — and plain GPT-5.6 Luna for the rest.

Full Docs Get API Key — Free $5 Credit

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2,400+

Developers

1.2M+

API calls served

100+

Endpoints

$0.01

Per call

Yep, that's it.

Try it live

Send a message and see GPT-5.6 Luna Pro respond in real time.

POST/v1/ai/chatopenai/gpt-5.6-luna-pro

Message *

Max Tokens

Maximum tokens in the response.

Stream

Real-time tokens

Hit "Send Request" to see the response

Context Window

1.1M tokens

Max Output

128K tokens

Input Price

$0.30 / 1M tokens

Output Price

$1.77 / 1M tokens

Strengths

✓

Pro reasoning mode

Identical weights to GPT-5.6 Luna, with reasoning mode fixed to pro.

✓

Same per-token price

Billed at the same rate as GPT-5.6 Luna; you pay for the additional reasoning tokens.

✓

1M token context, 128K output

Handles up to 1,050,000 input tokens and returns up to 128,000 output tokens per call.

✓

Tools and structured output

Function calling, JSON schema outputs and seeds, as on the base model.

Quick start

Copy this snippet and start making calls with GPT-5.6 Luna Pro.

const res = await fetch('https://api.yepapi.com/v1/ai/chat', {
  method: 'POST',
  headers: {
    'x-api-key': 'YOUR_API_KEY',
    'Content-Type': 'application/json',
  },
  body: JSON.stringify({
    "model": "openai/gpt-5.6-luna-pro",
    "messages": [
      {
        "role": "user",
        "content": "Explain API gateways in 2 sentences."
      }
    ],
    "maxTokens": 256
  }),
});
const { data } = await res.json();
console.log(data.message.content);

Why use GPT-5.6 Luna Pro through YepAPI?

✓One API key for all models — no separate accounts

✓OpenAI SDK compatible — just change the base URL

✓No monthly minimums — pay per token

✓Switch models with one line of code

✓Full provider passthrough — citations, search results, and all extras included

✓Streaming and non-streaming support on every model

✓Works with Cursor, Claude, LangChain, and any LLM tool

✓Unified billing across all providers

GPT-5.6 Luna Pro API — pricing, context window & access

GPT-5.6 Luna Pro is the same underlying model as GPT-5.6 Luna, served with OpenAI's reasoning mode set to pro. It pairs a 1,050,000-token context window with up to 128,000 output tokens per response, at $0.30 per 1M input and $1.77 per 1M output tokens through YepAPI.

Through YepAPI you call GPT-5.6 Luna Pro on an OpenAI-compatible endpoint with a single key — the same key that reaches GPT-6, Claude, Gemini, Grok and the SEO, SERP and scraping APIs. Input: text, images, files.

What is GPT-5.6 Luna Pro?

GPT-5.6 Luna Pro is the same underlying model as GPT-5.6 Luna, served with OpenAI's reasoning mode set to pro. It deliberates longer before answering, which improves results on complex, multi-step problems at the cost of latency. Per-token pricing matches GPT-5.6 Luna; the added cost is the longer reasoning it chooses to do. It accepts text, images, files as input, handles up to 1,050,000 tokens of context and returns up to 128,000 output tokens per call.

Build with GPT-5.6 Luna Pro via YepAPI

YepAPI serves GPT-5.6 Luna Pro on the OpenAI-compatible /v1/ai/chat endpoint. Point your base URL at YepAPI, add your key, and set the model string to gpt-5.6-luna-pro (or the full openai/gpt-5.6-luna-pro). Function calling, structured outputs and reasoning settings pass straight through, and switching to any other model on the platform is a one-string change per request.

GPT-5.6 Luna Pro API pricing — $0.30 / 1M input, $1.77 / 1M output

GPT-5.6 Luna Pro costs $0.30 per 1M input tokens and $1.77 per 1M output tokens through YepAPI, pay per token with no minimums. Failed calls are never charged, and every request is itemised in your dashboard API Logs so you can see exactly what a 128,000-token response cost.

GPT-5.6 Luna Pro use cases

Use GPT-5.6 Luna Pro for the steps where correctness is worth the wait — final reviews, hard debugging, planning — and plain GPT-5.6 Luna for the rest.

Try GPT-5.6 Luna Pro free

Every new YepAPI account includes $5 in free credit with no card required — enough to test GPT-5.6 Luna Pro on your own prompts before committing to paid usage. Create an account, copy your key, and call gpt-5.6-luna-pro right away.