GPT-5.6 SOL, ALONG WITH TERRA AND LUNA, WILL LAUNCH PUBLICLY THIS THURSDAY

Summary from the TLDR AI newsletter

OpenAI is releasing GPT-5.6 Sol, Terra, and Luna tomorrow. It is currently expanding preview access globally. Sol is the flagship model. Terra is a balanced model for everyday work. Luna is a fast and affordable model. Terra has competitive performance to GPT‑5.5 while being 2x cheaper and Luna brings strong capability at our lowest cost.