OpenAI’s Astra Cyber Model, AfterQuery’s $3.2 Billion Valuation, and Multi-Day Coding Agents | UpNext AI – September 2, 2026
OpenAI previews safeguards for its forthcoming Astra cyber model, AfterQuery reportedly reaches a $3.2 billion valuation, and new research explores a layered harness for multi-day autonomous coding.
Covered in this episode:
- OpenAI says Astra can find and exploit security flaws, alongside a restricted-access release plan.
- AfterQuery reportedly becomes Y Combinator’s fastest startup to reach unicorn status.
- Harness-of-Harness research tests iterative control loops for long-running coding agents.
- Anthropic launches Claude Fable 5.1 and Mythos 5.1.
- Google publishes its August AI updates…
The skinny
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