GPT-6 Luna

The most efficient tier of OpenAI's GPT-6 family (Astra, Sol, Luna), built for focused, high-volume tasks.

Context: 1M tokens
Max output: 128K
Cutoff: May 2026
Released: Sep 2026

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Hosted API price

List price via OpenAI · per 1M tokens

USD

Input: $0.10 /1M
Output: $0.50 /1M
Hosted by: 1 provider

Hosted API pricing

How we price

Order

Providers are listed cheapest input rate first, then by output rate, a tie going to the creator's own listing. A provider that lists the model without a published rate sits at the end.

Prices

Base-tier, on-demand rates in USD per 1M tokens, converted at ECB reference rates where a provider publishes in another currency. Cached-input and batch rates show only where a provider publishes them. "Cheapest" marks the one provider with the lowest input and output pair; a tie wears no badge.

Cost

Input rate times the input tokens plus output rate times the output tokens, at the monthly volume set above the table. Cached-input, batch, long-context and reasoning-token billing are not modelled.

Transparency and funding

Affiliates: Affiliate links are marked. We may earn a commission if you click them, but commissions never affect the order.

Every provider serving GPT-6 Luna, cheapest input first. Set your monthly volume to see what each would bill.

Input M Output M

Every provider serving GPT-6 Luna, with its price per 1M input and output tokens and what the volume above would cost
Provider	Input /1M	Output /1M	Cached input /1M	Cost at 10M in + 2M out	Link
OpenAI Creator	$0.10	$0.50	$0.01	$2.00	Visit website

Heads up: Base-tier, on-demand rates per 1M tokens; cached, batch and long-context tiers excluded. A provider may serve a shorter context or a quantized build than the creator's release. Verify before provisioning. More on how we price.

Similarly priced models

The models nearest GPT-6 Luna by blended rate, each at its own cheapest provider.

Models priced nearest GPT-6 Luna per 1M tokens, each at its cheapest provider
Model	Blended /1M	Input /1M	Output /1M	Context	Cutoff	vs GPT-6 Luna
GPT-4.1 Nano OpenAI	$0.15	$0.10	$0.40	1M	Jun 2024	−10%
Ministral 3 8B Mistral	$0.15	$0.15	$0.15	256K		−10%
Qwen3.5-Flash Alibaba Cloud	$0.15	$0.10	$0.40	1M		−10%
Nemotron 3 Super 120B A12B Nvidia	$0.1583	$0.09	$0.50	1M	Jun 2025	−5%
MiMo-V2.6-Flash Xiaomi MiMo	$0.1633	$0.14	$0.28	1M		−2%
GPT-6 Luna This model OpenAI	$0.1667	$0.10	$0.50	1M	May 2026
Gemma 4 31B Google Cloud	$0.17	$0.13	$0.37	256K	Jan 2025	+2%
Qwen3-235B-A22B Instruct (2507) Alibaba Cloud	$0.1717	$0.09	$0.58	262K		+3%
Qwen3.5-27B Alibaba Cloud	$0.1863	$0.086	$0.688	262K		+12%
Hy3 Tencent	$0.198	$0.132	$0.528	262K		+19%
Ministral 3 14B Mistral	$0.20	$0.20	$0.20	256K		+20%

USD per 1M tokens at each model's cheapest listed provider. Blended is the cost of 10M input plus 2M output tokens, spread over the 12M.

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Capabilities

What GPT-6 Luna accepts and can do, as published by OpenAI.

Text Accepts and generates natural-language text.
Image Accepts images as input alongside text.
Reasoning Thinks before it answers, always on or as a switchable mode.
Function calling Connect to external tools, APIs, and systems.
Structured output Return responses in structured formats like JSON.
Web search Search the web for up-to-date information.
Code execution Write and execute code in a sandboxed environment.
File upload Process uploaded documents, spreadsheets, and other files.
MCP Connect to services via Model Context Protocol.
Image generation Generate and edit images from text prompts.

Common questions

What is GPT-6 Luna good for?

Focused, repeatable tasks at high volume. It sits at the lower-cost end of OpenAI's lineup.

When is GPT-6 Luna not a good fit?

The hardest end-to-end work, which OpenAI points to Astra and Sol for. No audio or video input, and closed weights, so no self-hosting.

What is the cheapest way to run GPT-6 Luna?

The cheapest hosted rate is $0.10 / $0.50 per 1M tokens via OpenAI.

How does GPT-6 Luna compare with GPT-5.6 Luna?

Same 1M-token context and text and image input. GPT-6 Luna lists at 50% less per 1M input tokens and 58% less per 1M output tokens than GPT-5.6 Luna. It came out 2 months later and has a newer knowledge cutoff (May 2026 against February 2026).

Can I self-host GPT-6 Luna?

No. OpenAI does not publish the weights; GPT-6 Luna is available only through hosted APIs.