GPT-6 Astra

GPT-6 Astra is OpenAI's most capable model, built for complex reasoning, software engineering, computer use, science, and professional work. Features like async tool calling and mid-turn steering allow it to run multistep agent workflows. It is available via the API under the model id gpt-6-astra and is rolling out first through Trusted Access/Daybreak, then to Plus, Pro, Business, Enterprise, and the API. OpenAI describes it as its first model at the Critical cybersecurity capability threshold, with advanced cyber access limited.