GPT-6 Astra

GPT-6 Astra is the OpenAI flagship, released September 3, 2026 and pitched squarely at computer use: driving a browser, filling forms, editing spreadsheets and operating desktop applications the way a person would. API pricing is $10 per million input tokens and $50 per million output, with cached input at $1 and batch at half price. Two modifiers matter more than the headline rate. Requests above 272,000 input tokens bill on a separate long-context tier at $20 input, $2 cached and $75 output, which is easy to trip on exactly the long-horizon agent runs Astra is sold for, because an agent accumulating screenshots and tool output crosses that line without deciding to. Fast mode doubles every rate. Astra is also the first model OpenAI has placed in the Critical cybersecurity tier of its own Preparedness Framework, after pausing it in August: it scored 100 percent on ExploitBench and chained previously unknown vulnerabilities without step-by-step human direction. Rollout began as a limited preview for vetted cybersecurity partners before reaching ChatGPT Plus, Pro, Business and Enterprise, the API, and AWS.