OpenAI says GPT-6.1 Terra matches GPT-6 Astra on the Agents' Last Exam computer-use benchmark at a tenth of Astra's price per token

OpenAI's fast, efficient GPT-6 series model for visual reasoning and computer use, released on October 26, 2026 at $1 per million input tokens and $5 per million output tokens, half the price of GPT-5.6 Terra and GPT-6.1 Sol.