About GPT-6 Luna
GPT-6 Luna is a large language model by OpenAI. GPT-6 Luna is the cheapest model in OpenAI's GPT-6 family, released on 22 September 2026 alongside GPT-6 Sol and trained with methods similar to the flagship GPT-6 Astra. It is priced at $0.10 per million input tokens and $0.50 per million output tokens — roughly a twentieth of Sol — and was available in the API at launch. This page tracks 36 recent news stories about GPT-6 Luna, curated from 30+ sources and updated every 15 minutes.
Andrej Karpathy
Vijaya Raji







