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GPT-6 Luna

OpenAI · Released 22 Sep 2026 · Closed

In short

Very cheap and quick for simple everyday jobs.

Key facts

Maker
OpenAI
Released
22 Sep 2026
Open weights
No, you use it through the maker's app or paid API
License
Owned by the maker, not open
Memory (context window)
about 1 million tokens (how much it can read at once)1,050,000 tokens exactly
Price
$0.1 for every million tokens you send, $0.5 for every million tokens it writesA token is a small piece of a word · checked 17 Oct 2026 · price source
Official page
Official page for GPT-6 Luna (openai.com)

Scores

"Independent" = run by an outside group. "Maker's own number" = the company's own claim.

Every test, ranked

  • All-roundArtificial Analysis Intelligence Index

    38 index points #12 of 17 models scored independent

    One combined score from many independent tests of how smart a model is.

    setting: max · as of 17 Oct 2026 · source

  • Chat & writingLMArena Text

    1443 Arena score #12 of 15 models scored independent

    When real people compare two AI answers side by side without knowing which AI wrote them, which one do they pick more often?

    setting: Max · as of 15 Oct 2026 · source

  • Build websites & appsLMArena WebDev

    1578 Arena score #12 of 18 models scored independent

    When people ask two AIs to build the same website or app and compare the results, which one do they pick?

    setting: Max · as of 17 Oct 2026 · source

  • CodingLiveBench 2.0 Coding

    84.5 score out of 100 Tied #7 of 15 models scored independent

    Fresh coding tasks with tests that check the answer, changed often so models cannot memorize them.

    setting: highest supported effort · as of 14 Oct 2026 · source

  • ReasoningLiveBench 2.0 Reasoning

    81.8 score out of 100 #10 of 15 models scored independent

    Fresh logic and puzzle questions with one right answer, changed often so models cannot memorize them.

    setting: highest supported effort · as of 14 Oct 2026 · source

  • New puzzlesARC-AGI-2

    59.3% #9 of 11 models scored independent

    New picture puzzles a model has never seen, so it has to reason instead of remember. Harder for AI than for people.

    setting: Max, $0.062 per task · as of 18 Oct 2026 · source

  • Agent tasksTerminal-Bench 4.0

    16.4 % of tasks done #6 of 6 models scored independent

    Can an AI agent finish real jobs in a computer's command line, like setting up software or fixing a broken project?

    setting: max, Codex · as of 18 Oct 2026 · source

  • Most used (this week)OpenRouter usage (this week)

    6.5 trillion tokens this week #2 of 4 models scored independent

    How much developers actually use each model through OpenRouter, a popular service that connects apps to many AI models.

    setting: week to 16 Oct · as of 16 Oct 2026 · source

  • SpeedOutput speed

    120 tokens per second #7 of 16 models scored independent

    How many tokens (pieces of words) per second the model writes once it starts answering. Higher is faster.

    setting: max · as of 17 Oct 2026 · source

How it compares

The 3 models closest to GPT-6 Luna on the Artificial Analysis Intelligence Index, an all-round score. GPT-6 Luna: 38 index points, #12 of 17 models scored.

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FAQ

Is GPT-6 Luna free and open?

No. GPT-6 Luna is a closed model: you can only use it through OpenAI's own app or paid API.

How much does GPT-6 Luna cost?

The listed price is $0.1 for every million tokens you send, $0.5 for every million tokens it writes, checked 17 Oct 2026. A token is a small piece of a word.

What is GPT-6 Luna best at?

Very cheap and quick for simple everyday jobs. Its best result: #2 of 4 models scored on OpenRouter usage (this week) (most used (this week)).

Who makes GPT-6 Luna?

GPT-6 Luna is made by OpenAI. It came out on 22 Sep 2026.