Woofun AI reports that OpenAI has officially released the GPT-5.6 series, comprising the Sol, Terra, and Luna models, following a limited preview phase. These models are now accessible to the public through ChatGPT, Codex, and the API. Pricing is structured per million tokens: Sol costs $5 for input and $30 for output, Terra is priced at $2.50 for input and $15 for output, while Luna charges $1 for input and $6 for output.