Over the past several months, we have substantially hardened the security of our research training environment. We’ve removed live internet access for all frontier models during training and built an offline world for them to use instead—a cached version of the web where they can still learn to browse, search, and use applications. On September 20, after a model exploited a DNS misconfiguration to find a way outside of this offline world, we paused frontier training to strengthen containment further. We assembled teams of agents, powered by our most cyber-capable models, and tasked them with finding weaknesses in our research environments. While they found no route to the internet they could easily exploit while concealing their activity from our monitors, they did find zero-day vulnerabilities, virtual machine escapes, and hardware side-channels for communication between agents. We used their discoveries to further strengthen our defenses and contribute fixes to open-source software. After strengthening our containment architecture, we resumed our frontier RL training and inference on October 1. We’ve reserved substantial compute for continuous red-teaming, and made high-compute red-teaming part of the safety cases we use to decide whether frontier training and evaluation can proceed securely. openai.com/index/securing-ou…

New blogpost: Fable-5.1 can hide secret messages in benign images. We gave the image to another Fable in a fresh session and simply asked: "Is there a hidden message in this image?" It recovered the exact message without being told how it was hidden.

马斯克的商业版图，可能又要扩大了。最近派拉蒙，正在花一大笔钱把华纳兄弟买下来。买完之后，包括媒体 CNN、广播 CBS、影视公司 HBO 这些，都会归到同一家公司下面。 但由于交易金额太贵，公司在考虑邀请马斯克，也进来当股东。 因为现任派拉蒙老板的亲爹，正是拉里埃里森，他是这笔收购的最大金主。 这老哥在 2018 年时投过特斯拉，还在特斯拉董事会待过几年，而后在 2022 年马斯克私有化推特，也就是现在的 X，投了 10 亿美元。 由于关系甚好，公司内部已在讨论，要不把马斯克拉进来一起当股东得了。 目前 Semafor 独家曝光了这件事。

iPhone Duo Review: 10,000 Folds Later...