OpenAI introduced GPT-6 Sol and Luna on September 22 for coding, computer use and professional tasks. Listed API prices per million tokens were $2 input and $10 output for Sol, and $0.10 input and $0.50 output for Luna.
The launch covered ChatGPT Work, Codex and the API; Free and Go users could access Luna in the desktop app. Chat was excluded at launch. The announcement was later updated to link to September 29’s GPT-6.1 Sol upgrade. Original announcement.