GPT-6 Astra

OpenAI · proprietary · gpt-6-astra

GPT-6 Astra is OpenAI's released flagship for the hardest end-to-end work across complex reasoning, coding, computer use, research, and document creation. The API model id is gpt-6-astra. It accepts text and image input with text output, supports low, medium, high, xhigh, and max reasoning effort (but not none), and provides a 1,050,000-token context window with up to 128,000 output tokens. Responses API tools include web and file search, image generation, code interpreter, hosted shell, apply patch, skills, computer use, MCP, and tool search; it also supports streaming, function calling, structured outputs, async tool calling, mid-turn steering, and configuration updates during a conversation. Standard pricing is $10 input, $1 cached input, $12.50 cache writes, and $50 output per million tokens. Requests above 272K input tokens cost 2x for input and cache and 1.5x for output across the full request; Batch and Flex are 50% of Standard, while Fast is 2x.