1. 研究称专有模型API的加密推理块可跨用户移植，公开日志中已解出个人信息与凭证 Researchers say an architectural weakness in proprietary large-language-model APIs can expose both model secrets and user data.

2. Anthropic将为新版Claude全球输出嵌入水印，具体检测方法仍待公布 Anthropic is introducing machine-readable marks for content produced by newer Claude models worldwide, as it puts its commitment under the EU AI Act’s transparency code into practice.

3. 医学研究服务商自称“绝不用AI”，却被发现虚构专家并冒用真实研究人员身份 Research Gold sells medical researchers help producing systematic reviews, meta-analyses and manuscripts ready for peer review, promising work that is “100% human-written, never AI.

In Brief

• OpenAI Begins Testing Ads in ChatGPT OpenAI is testing clearly labeled ads in ChatGPT to help support free access. The company says ads will not influence answers and that the test includes privacy protections and user controls.

• ChatGPT and Gemini Each Pass One Billion Users Google says Gemini has reached one billion monthly users, while an OpenAI spokesperson says ChatGPT surpassed one billion weekly users in July. The differing measurement periods prevent a direct comparison between the services.

• Two-Month-Old River AI Raises $1.1 Billion River AI, founded by former xAI co-founder Igor Babuschkin, raised $1.1 billion in a seed and Series A round led by General Catalyst and AI investment firm AMP PBC. Its API lets developers fine-tune and serve open models using reinforcement learning and LoRA.

• OpenAI Releases a ChatGPT Desktop App for Linux OpenAI launched a worldwide preview of its Linux desktop app, bringing ChatGPT, ChatGPT Work, and Codex to supported versions of Ubuntu, Debian, and Fedora. The company says compatible downstream distributions may also run the app.

• Nvidia Launches Nemotron 3.5 Lightning and an Open Model Router Nvidia released Nemotron 3.5 Lightning, a customizable 30-billion-parameter mixture-of-experts model for agent workloads, alongside the open-source NeMo Switchyard routing library. Nvidia claims Lightning can produce output up to four times faster than comparable models, while Switchyard directs requests among models according to quality, latency, and cost requirements.

• OpenAI Reportedly Completes $7 Billion Employee Share Sale OpenAI reportedly bought $7 billion in shares from employees through a tender offer that valued the private company at $852 billion. OpenAI did not comment on the reported transaction.

• Google Tests AMIE in Simulated Video Consultations Google Research and Google DeepMind tested AMIE, a Gemini-based research medical system, in simulated video consultations with patient actors. Clinical evaluators rated it favorably across several competencies, but Google says more research is required before real-world deployment.

• OpenAI Brings Daybreak Cybersecurity Models to AWS OpenAI and AWS made Daybreak cybersecurity capabilities available through Amazon Bedrock for enterprise security workflows.

• Apple Tests iPhone Photo-Provenance System Code found in an iOS 27 beta reportedly describes an optional “Apple Reference Image” feature that embeds provenance data when an iPhone photo is captured. The unreleased system would send the raw image and metadata to Apple’s Private Cloud Compute infrastructure for authentication when requested by the user.

• Spotify Will Label AI Personas and Remove Them From Recommendations Spotify plans to begin marking profiles that represent AI-generated identities with “AI Persona” badges in September. Labeled profiles will be excluded by default from editorial, algorithmic, and personalized recommendations unless a user follows them.

• Zoom Patches Cross-Platform Device-Takeover Flaw Zoom patched a vulnerability in its annotation feature that researchers at A Security say could let an attacker execute code on meeting participants’ devices without user action or a visible warning. The researchers said they developed the exploit in one day using fewer than 20 prompts to publicly available AI models.

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