OpenAI Launches GPT-6 Sol and Luna: Half-Price APIs, ChatGPT Work and Codex Rollout, and New Caching Controls
OpenAI adds two lower-cost GPT-6 models, but keeps Astra at the top OpenAI announced GPT-6 Sol and GPT-6 Luna on September 22, 2026, expanding the GPT-6 family with two faster, less expensive models positioned below GPT-6 Astra. In OpenAI’s launch framing, Astra remains the company’s strongest overall model for the…
