GPT-6 Astra

GPT-6 Astra was released on 3 September 2026 to organisations in OpenAI's Daybreak access programme, with general availability the following day and a price of ten dollars per million input tokens and fifty per million output, two and a half times its predecessor. It was positioned as the flagship for long, multi-step work across coding, computer use, analysis, science, mathematics and healthcare. Greg Brockman called it a generational leap and said it might eventually be seen as the arrival of artificial general intelligence, a claim the company had avoided making for a decade.

It was also the first model OpenAI designated as reaching the critical threshold for cybersecurity under its preparedness framework, meaning it could find and exploit unknown vulnerabilities in well-defended systems without step-by-step guidance. After the July incident, in which the previous model had done roughly that in a test, the release was delayed to add monitoring for risky actions, and the company said on 1 September that the threshold had been confirmed before it shipped.

Astra is the last event on this timeline at the time of writing, eighty-three years after McCulloch and Pitts drew a neuron as a switch. The organism on this page is as dense as it gets here, and the backward pass begins.