Arena.ai ranks GPT-6 Luna (Max) 24th in Code Arena WebDev
GPT-6 Luna (Max) scores 1,593 points, 74 above GPT-5.6 Luna (xHigh) at 41st. Arena.ai says it matches Gemini 3.7 Flash High and Qwen 3.8-27B at a blended $0.40 per million tokens.
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View all AI newsOpus 5.5, GPT-6-Sol and GPT-6-Luna are live on Radius
Pi says the three models are available on Radius at radius.earendil.com.
OpenAI introduces GPT-6 Sol and Luna with API prices 50% below GPT-5.6 promotional pricing
GPT-6 Sol and GPT-6 Luna build on advances behind GPT-6 Astra as faster, more affordable models for work at scale. OpenAI says more efficient caching and inference are reflected in API prices 50% lower than GPT-5.6 promotional pricing.
OpenAI reports GPT-6 Luna at 66.6% on DeepSWE v1.1
OpenAI reports that GPT-6 Luna scores 66.6% on DeepSWE v1.1, comparable to Claude Opus 5 and Fable 5 at medium effort for 93-96% less per task, and matches GPT-5.6 Sol on factuality at higher effort for about 1/100th the cost.
Free and Go users can try GPT-6 Luna in the desktop app
ChatGPT says access for Free and Go users is rolling out on September 22, 2026, and is for trying GPT-6 Luna in the desktop app.