GPT-5.6 Luna specs, prices, where it runs and its benchmark standing

Name: GPT-5.6 Luna
Author: OpenAI

closed weights · top 10 on 0 of 9 · released Jul 9, 2026

Provider: OpenAI
Release date: Jul 9, 2026; Boards
Parameters: Not disclosed by OpenAI
Modalities: Text, Image, Files to Text; OpenRouter
License: Proprietary; LMArena
Context window: 1.05M tokens; Pricing
Pricing: $0.2 in / $1.2 out per 1M tokens; All prices
Hosting: 8 priced API routes · Azure OpenAI (28 regions) · OpenRouter; Pricing Regions
Weights: Closed weights
Benchmarks: 9 boards captured

Rank	Board	Category	Score	Of
17	OpenRouterUsage · as “openai/gpt-5.6-luna-20260709”	Usage	2.7T tok	18
21	Document ArenaVision · as “GPT-5.6 Luna (xHigh)”	Vision	1,460	40
30	GPQA DiamondReasoning · as “gpt-5.6-luna_max”	Reasoning	91.6%	100
30	Epoch ECIReasoning · as “GPT-5.6 Luna”	Reasoning	156.8	100
37	ARC-AGI-2Reasoning · as “GPT-5.6 Luna 2026-07-30 (Max)”	Reasoning	59.6%	92
41	Vision ArenaVision · as “GPT-5.6 Luna (xHigh)”	Vision	1,256	85
42	LiveBenchReasoning · as “gpt-5.6-luna-max”	Reasoning	73.6%	64
52	WebDev ArenaCoding · as “GPT-5.6 Luna (xHigh, Codex Harness)”	Coding	1,519	82
63	Text ArenaChat · as “GPT-5.6 Luna (xHigh)”	Chat	1,453	84