GPT-6 Astra Explained: OpenAI's New Flagship Model for Coding and Agents
GPT-6 Astra is OpenAI's flagship model, released September 2026. Learn what's new, its 1M-token context window and pricing, how it performs at coding, where to use it (ChatGPT, Codex, API), and when a cheaper GPT-6 model makes more sense.