GPT-6 Luna

Name: GPT-6 Luna
Author: OpenAI

by OpenAIGPT

APIAvailable through a hosted API — pay per token, no self-hosting required

Released September 20261050K context≈ 787,500 words

GPT-6 Luna is the small, fast end of the GPT-6 family, aimed at high-volume work such as classification, extraction and simple agent steps where cost per call matters most. It succeeds GPT-5.6 Luna at half the price and with better results on OpenAI's evaluations, and is also the model free ChatGPT users get in the desktop app. It accepts text and images with a 1.05M-token context window and up to 128K output tokens.

Benchmark Scores

Benchmark	Score	Type	Recorded
SciCode	54.6	accuracy	today
Humanity's Last Exam	38.5	accuracy	today
TerminalBench	12.6	accuracy	today
LCR	83.3	accuracy	today

GPT-6 Luna

by OpenAIGPT

APIAvailable through a hosted API — pay per token, no self-hosting required

Released September 20261050K context≈ 787,500 words

GPT-6 Luna is the small, fast end of the GPT-6 family, aimed at high-volume work such as classification, extraction and simple agent steps where cost per call matters most. It succeeds GPT-5.6 Luna at half the price and with better results on OpenAI's evaluations, and is also the model free ChatGPT users get in the desktop app. It accepts text and images with a 1.05M-token context window and up to 128K output tokens.

Benchmark Scores

Benchmark	Score	Type	Recorded
SciCode	54.6	accuracy	today
Humanity's Last Exam	38.5	accuracy	today
TerminalBench	12.6	accuracy	today
LCR	83.3	accuracy	today

Glossary

Context WindowThe maximum number of tokens a model can process in a single conversation or prompt.TokenA small unit of text (a word, subword, or punctuation mark) that a language model breaks input into for processing.TokensThe basic units of text that a language model processes, typically representing words or word fragments.

GPT-6 Luna

Benchmark Scores

GPT-6 Luna

Benchmark Scores

Details

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