
OpenAI: How we built ChatGPT’s novel ad stack for user trust and relevance
Learn how OpenAI built ChatGPT’s LLM-powered ad stack to understand conversational intent, keep ads separate from answers, and deliver relevant ads at scale.
OpenAI built a specialized advertising system for chat conversations that works differently from traditional ads because user intent develops gradually across multiple conversation turns rather than appearing as a single discrete event. The system uses a custom language model to interpret conversation context and decide when and which ads to show, while keeping the ads selection process completely separate from the chatbot's answer generation to prevent advertising from influencing responses. This architectural separation ensures ads cannot interfere with the core product and allows the system to show no ad at all if one is not clearly beneficial to users.
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OpenAI and Google Cloud are bringing frontier models and Codex workflows to Gemini’s Model Garden, available through Google Cloud Marketplace.
Also reported by Ars Technica

Nearly two-thirds of US doctors are turning to an AI-powered search engine to make patient decisions, propelling a little-known tech startup to a $15 billion valuation while prompting a debate over the future of patient care. Miami-based OpenEvidence, founded by serial entrepreneur Daniel Nadler in 2022, said that many of America’s 1 million physicians processed more than 42 million prompts last month. Doctors are using the company’s chatbot to scour medical journals and clinical guidelines to h

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After chatbot startup Character.AI filed for bankruptcy earlier this week, many of its employees will have the opportunity to take jobs at Disney. Character.AI’s former CEO Karandeep Anand recently became the entertainment giant’s first CTO, and the startup previously said that Disney had agreed to acquire some of its assets for $20 million. A legal […]
Also reported by Wired AI and Ars Technica

Google kicked off 2026 with the addition of Personal Intelligence to Gemini, allowing its AI to pull in more of your data to formulate answers. It started as a paid feature but eventually came to all Gemini users. However, this feature wasn't available in the car until now. Google is rolling out Personal Intelligence to Android Auto and Google Built-in, and it is still, thankfully, an optional feature. As Google points out, a generative AI's outputs are better "when it knows the world and knows