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GPT-6 Luna API

$0.1/Mtok in

OpenAI · text

GPT-6's high-volume tier: the cheapest frontier-family model in the catalog, with a million-token window.

Open playgroundView API docs

Overview

About GPT-6 Luna

GPT-6's high-volume tier: the cheapest frontier-family model in the catalog, with a million-token window. Every model on CompanyFabric shares the same API key, billing balance, and rate-limit envelope, one integration covers the entire library.

Facts

At a glance

Availability

Live

Pricing

$0.1/Mtok in

Metered exactly per call

Context window

1,050k tokens

Commercial use

See license

Commercial output use permitted per OpenAI terms.

Variants

All endpoints

GPT-5.5

$5/Mtok in

OpenAI's flagship, one key away.

Chat Completions

GPT-6 Astra

$10/Mtok in

OpenAI's GPT-6 flagship, a million-token window one key away.

Chat Completions

GPT-6 Sol

$2/Mtok in

GPT-6 for complex coding and agent work at a fifth of Astra's price, with the same million-token window.

Chat Completions

GPT-6 Luna

$0.1/Mtok in

GPT-6's high-volume tier: the cheapest frontier-family model in the catalog, with a million-token window.

Chat Completions

Quickstart

How to use the GPT-6 Luna API

  1. 1

    Create a free CompanyFabric account, starter credits are included, no card required.

  2. 2

    Copy your API key from the dashboard. One key covers every model in the library.

  3. 3

    Point any OpenAI SDK at api.companyfabric.com/v1 and set model to "openai/gpt-6-luna".

  4. 4

    Read the exact metered cost of the call from the response, the same number shown in the playground.

Use cases

What teams build with it

Agents & copilots

Drive agent loops, tool calls, and user-facing assistants over the OpenAI-compatible endpoint.

agentstool useassistants

Content pipelines

Summarization, rewriting, and structured generation at metered per-token cost.

contentsummarization

Extraction & classification

Turn unstructured input into typed JSON with schema-constrained output.

extractionjson mode

Get better output

Prompting tips

  • State the output format before the task, models follow contracts declared early.
  • Few-shot beats description: two worked examples outperform a paragraph of rules.
  • Cap output length explicitly when cost matters; output tokens dominate most bills.

Exact, metered, prepaid

GPT-6 Luna pricing

GPT-6 Luna pricing is per token: $0.1 / M input · $0.5 / M output. Output tokens cost 5× input tokens, so long generations, not long prompts, are what actually drive most bills. A typical call with a 2k-token prompt and a 1k-token answer costs about $0.0007.

Every call is metered exactly and attributed to your key, the dashboard, the API usage response, and your invoice all read from the same ledger row. Cap any key's monthly spend with a budget cap, and bring your own provider key (BYOK) at 0% platform fee if you already have a direct contract.

EndpointTypePrice
GPT-5.5Chat$5 / M input · $30 / M output
GPT-6 AstraChat$10 / M input · $50 / M output
GPT-6 SolChat$2 / M input · $10 / M output
GPT-6 LunaChat$0.1 / M input · $0.5 / M output

Starter credits

Use GPT-6 Luna free

Your CompanyFabric starter credits cover your first GPT-6 Luna calls at no cost, create a free account, no card required, and the credits apply to GPT-6 Luna and every other model on the key. When they run out, prepaid credits or BYOK (0% fee) take over with no plan to pick.

All ways to use AI models free →

Production-grade

Code samples

import OpenAI from "openai"

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

const res = await client.chat.completions.create({
  model: "openai/gpt-6-luna",
  max_tokens: 1024,
  temperature: 0.7,
  messages: [{ role: "user", content: "Say hello from the fabric." }],
})

console.log(res.choices[0].message.content)

Playground

Try it in the browser

Playground$0.1 in / $0.5 out per 1M tokens

Comparisons

GPT-6 Luna vs the alternatives

GPT-6 Luna vs GLM-5.3-Flash

GPT-6 Luna and GLM-5.3-Flash compete for the same text workloads. Both run behind the same CompanyFabric key at exact metered prices, A/B them on your real prompts and let the outputs decide, then switch with a one-line change.

Full comparison: GPT-6 Luna vs GLM-5.3-Flash →

GPT-6 Luna vs Gemini 3.5 Flash-Lite

GPT-6 Luna and Gemini 3.5 Flash-Lite compete for the same text workloads. Both run behind the same CompanyFabric key at exact metered prices, A/B them on your real prompts and let the outputs decide, then switch with a one-line change.

Full comparison: GPT-6 Luna vs Gemini 3.5 Flash-Lite →

GPT-6 Luna vs DeepSeek V4.1 Flash

GPT-6 Luna and DeepSeek V4.1 Flash compete for the same text workloads. Both run behind the same CompanyFabric key at exact metered prices, A/B them on your real prompts and let the outputs decide, then switch with a one-line change.

Full comparison: GPT-6 Luna vs DeepSeek V4.1 Flash →

Compare

GPT-6 Luna head to head

GPT-6 LunavsGLM-5.3-FlashGPT-6 LunavsGemini 3.5 Flash-LiteGPT-6 LunavsDeepSeek V4.1 FlashGPT-6 LunavsMiMo-V2.5-ProGPT-6 LunavsGemini 3.1 Flash-LiteGPT-6 LunavsMiMo-V2.6-Pro

FAQ

Frequently asked questions

How much does the GPT-6 Luna API cost?

$0.1 / M input · $0.5 / M output. Every call is metered exactly and shown before you run it.

How do I get a GPT-6 Luna API key?

Create a CompanyFabric account, and one key unlocks GPT-6 Luna and every other model in the library. Free starter credits are included, no subscription, no card required to try it.

Why use GPT-6 Luna on CompanyFabric instead of going direct?

One key, one prepaid balance, and one rate-limit envelope across the whole library, at pricing at parity with or below the direct API. Model switching is a one-line change, and BYOK routing is 0% fee.

Is the API OpenAI-compatible?

Yes, point any OpenAI SDK at api.companyfabric.com/v1 and set model to "openai/gpt-6-luna".

Can I use the output commercially?

Commercial output use permitted per OpenAI terms.

How does billing work?

Prepaid credits via card, or BYOK with your own provider keys at 0% platform fee. No subscription required; balances never expire.

Provider

About OpenAI

OpenAI publishes the gpt family. Also in this family: GPT-5.5, GPT-6 Astra, GPT-6 Sol. License: Commercial output use permitted per OpenAI terms.

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One key. Every model. Exact prices.

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