Model by OpenAI

GPT-6 Luna Pro

GPT-6 Luna Pro is GPT-6 Luna run in pro reasoning mode.

Checked 2026-11-05

GPT-6 Luna Pro is GPT-6 Luna run in pro reasoning mode. OpenRouter calls it the same underlying model, served with reasoning.mode set to pro for higher-quality answers on complex tasks. It was listed on 22 September 2026. The context window is 1,050,000 tokens. It takes text, images and files and returns text only. On 5 November 2026 OpenRouter shows $0.10 per million input tokens and $0.50 per million output, which is the lowest price of any OpenAI model in this batch. The cost note on the listing warns that pro mode spends far more tokens, so a low per-token rate can still add up on long reasoning chains. No weights are listed, so it is closed. It suits high-volume jobs that want better answers than a plain small model, such as classification with tricky edge cases or first-pass triage. For the hardest work, the Sol and Astra tiers sit above it. You reach it through the OpenAI API or OpenRouter. Figures come from OpenRouter's public model list and model page. We have not run it.

Mentioned here

Questions

What is the context window of GPT-6 Luna Pro?

1,050,000 tokens, with up to 128,000 tokens of output.

How much does GPT-6 Luna Pro cost?

$0.1 per million input tokens and $0.5 per million output tokens, checked 31 October 2026.

Can I run GPT-6 Luna Pro on my own hardware?

No. The weights are not published, so you use it through the maker's API or a hosting provider.

Who makes GPT-6 Luna Pro?

OpenAI makes it, and released it on 22 September 2026.

Reviews

Loading reviews…

Write a review

Your rating

Up to 1000 characters. Stars alone are enough.

Similar

  • GPT-4.1

    GPT-4.1 is OpenAI's April 2025 non-reasoning model, built for instruction following and long-context code work, and it is now deprecated.

    • Closed

    OpenAI, 1M context, $2 in / 1M

  • o3

    o3 is OpenAI's April 2025 reasoning model, and it is now deprecated, so it suits only code that still calls it.

    • Closed

    OpenAI, 200K context, $2 in / 1M

  • gpt-oss-20b

    gpt-oss-20b is OpenAI's smaller open-weights model, suited to running a reasoning model on your own machine or paying very little through an API.

    • Open weights

    OpenAI, 131K context, $0.03 in / 1M

  • GPT-5.4 Nano

    GPT-5.4 Nano was OpenAI's cheapest GPT-5.4 model, built for speed-critical, high-volume jobs, and it is now deprecated.

    • Closed

    OpenAI, 400K context, $0.20 in / 1M

  • GPT-5.4 Mini

    GPT-5.4 Mini is OpenAI's smaller GPT-5.4 model, aimed at high-throughput coding and reasoning work where the full model costs too much.

    • Closed

    OpenAI, 400K context, $0.75 in / 1M

  • GPT-5.4

    GPT-5.4 is an earlier OpenAI frontier model, and it suits teams already on the OpenAI API who need a very long context for coding and document work.

    • Closed

    OpenAI, 1.1M context, $2.50 in / 1M