GPT-6 Luna
by OpenAI · ID gpt-6-luna · Released 2026-09 · Proprietary
1441
ELO Score
-
MMLU
-
HumanEval
1.05M
Context Window
$0.10
Input Price
About GPT-6 Luna
The cheap, high-volume tier of the GPT-6 family, released 22 September 2026 at $0.10/$0.50, half the input and 58% below the output price of GPT-5.6 Luna, and permanent rather than promotional. Cached input $0.01 per million. 1.05M-token context, 128K output, knowledge cutoff 18 May 2026. Scores 66.6% on DeepSWE 1.1, and OpenAI says that at higher effort it matches GPT-5.6 Sol's factual reliability at roughly one hundredth of the task cost. Reaches Free and Go users in the ChatGPT desktop app. Prices checked 23 September 2026. Arena text score 1441 (GPT-6 Luna (Max), 86,478 votes), leaderboard of 27 October 2026.
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