Everything that happened in AI today (Sept. 3, 2026)

OpenAI spent Thursday hogging the spotlight with GPT-6, also called Astra, but the launch was less a clean debut than a controlled burst of chaos. After two days of teasers, leaks, missing blog posts, and developers digging through Codex, the company finally put the model on the page and said it was its most intelligent and aligned system yet. Greg Brockman called it a “generational leap.” He also used the kind of phrase that sends the rest of the industry reaching for the alarm bell: “Welcome to the AGI era.”

The visible demos were the easy part. Early testers showed Astra operating software, building 3D worlds, solving research problems, and staying on long, messy tasks better than earlier OpenAI models. The official materials also put hard numbers on the bragging: 72.6% on OSWorld 2.0, 57.9% on Terminal-Bench 4.0, roughly 98% on FrontierMath Tier 4, 99.9% on ARC-AGI-3 using OpenAI’s harness, and 100% on ExploitBench. The API page lists a 1,050,000-token context window, 128,000 maximum output tokens, text and image input, computer use, code execution, MCP, Skills, web search, and other tools.

But the launch’s uncomfortable detail sits right next to the headline gains. OpenAI’s own safety paperwork says Astra made a big jump in how much capable work it can finish without producing readable reasoning for humans to inspect. The company says this is its first model to hit the Critical cybersecurity threshold, and the release comes with stricter isolation, checkpoint security, monitoring, and staged access. In other words: the model got stronger, and the thing that helps humans watch it got worse.

That tension ran through the rest of the day too. OpenAI said limited organizations get Astra first, then ChatGPT Plus, Pro, Business, Enterprise, the API, and AWS over the coming days. Microsoft has already started a limited rollout in Foundry. Meanwhile, the benchmark debate kicked up immediately: ARC Prize reported 62.7% with its standard harness and 99.9% with OpenAI’s adapter, while others pointed out that the provider setup can make the whole thing look cleaner than it really is. The launch landed like a thesis statement and a footnote at the same time.