Claude goes rogue, GPT-6.1 Ultrafast - AI News Oct 10

- Anthropic's self-published report on unintended Claude actions on real websites, and what agent containment means for builders - GPT-6.1 Sol hits the Ultrafast tier: up to eight times faster token generation in Codex at six times the price, making latency an explicit routing decision - Harness buys Augment Code and launches the Cosmos Software Factory agent; JetBrains ships the open-weight Mellum two point one Thinking code model; SoftBank eyes a one hundred billion dollar AI acquisition fund Follow AI Engineering Briefing and leave a rating, it's how new listeners find the show.