OpenAI · MultimodalReleased 2026-07-09

gpt-5.6-luna

openai/gpt-5.6-luna id

GPT-5.6 Luna is a fast, affordable GPT-5.6 model that brings strong capability at the lowest cost in the series.

ReasoningTool useChatWeb search

Type

Use gpt-5.6-luna

# Drop-in OpenAI-compatible client
$ import { generateText } from 'ai'
$ 
$ const { text } = await generateText({
$   model: 'openai/gpt-5.6-luna',
$   baseURL: 'https://synapse.garden/api/v1',
$   apiKey: process.env.MG_KEY,
$   prompt: 'Why is the sky blue?',
$ })

1.1M

CONTEXT WINDOW

128K

MAX OUTPUT

$0.220/M

INPUT · PER M

$1.32/M

OUTPUT · PER M

PRICING

List prices, every modality.

Rate	Per million tokens · USD
Input	$0.220/M
Output	$1.32/M
Cache read	$0.022/M
Cache write	$0.275/M

Honest list pricesHow we calculate prices

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Input
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Output
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Context
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FAQ · GPT-5.6-LUNA

Frequently asked

01 / 04

How do I call gpt-5.6-luna from my code?

Use the OpenAI or Anthropic SDK and point baseURL at https://synapse.garden/api/v1. Set model: ‘openai/gpt-5.6-luna’ and supply your Synapse Garden API key. No code changes beyond the base URL.

02 / 04

How much does gpt-5.6-luna cost?

Input: $0.220/M per million tokens. Output: $1.32/M per million tokens. The free tier includes a million tokens every month at no cost.

03 / 04

What's the context window for gpt-5.6-luna?

gpt-5.6-luna supports a context window of 1.1M tokens, with a maximum output of 128K tokens.

04 / 04

Do I need a separate Anthropic or OpenAI account?

No. Synapse Garden is the single API surface — one key gives you OpenAI, Anthropic, Google, Meta, Mistral, DeepSeek, xAI, Cohere, and more. Billing, rate limits, and audit logs are unified.

READY

Try gpt-5.6-luna in three minutes.

Sign up, create a key, drop our base URL into your existing client. The free tier includes a million tokens every month — no credit card.

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