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Anthropic Releases Frontier Day Founder Video

No.26 · Thursday, September 17, 2026 · Today in AI

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01Anthropic Releases Frontier Day Founder VideoAnthropic's developer account posted a 2-minute-7-second founder interview video shot at Frontier Day in San Francisco on September 16. Four companies, Spawn, Hex, Sazabi and Phylo, describe what building a company on Claude looks like right now.
02OpenAI Publishes Guide to Using Admin Console Analytics ToolsOn September 16, OpenAI released an admin guide that ties ChatGPT Work and Codex usage, tasks, and performance data to business value. The company says the analytics numbers are only a starting point — business leaders still have to work out the actual payoff.
03OpenAI Tests Sponsored Agents in ChatGPT AdsOn September 16, OpenAI started testing sponsored agents that let people chat with a company-sponsored agent after clicking a ChatGPT ad, running the trial with a limited group of US advertisers. The same day also brought the natural-language Ads Manager plugin for building campaigns, plus HubSpot and Shopify integrations.
04OpenAI Holds ChatGPT Workshops for Older Adults in 10 CitiesOpenAI Academy partnered with AARP's OATS to hold free in-person ChatGPT workshops for 1,000 older adults across 10 U.S. cities on September 16. The share of ChatGPT messages linked to users 55 and older in the U.S. has grown from 6% to nearly 10% in a year.
05OpenAI Announces GPT-5.5 Retirement From ChatGPTThe official ChatGPT account said on September 15 that GPT-5.5 will be pulled from every ChatGPT, ChatGPT Work, and Codex plan on October 14. OpenAI's developer account quickly drew a line, saying the model stays available through the API and Codex sessions authenticated with an API key.
06Walden Yan Appears in Video on Devin Testing With GPT-6 AstraThe OpenAI Developers account posted a one-minute video of Cognition co-founder Walden Yan on September 15. Inside Devin, GPT-6 Astra backs up the claim that code works with tests, cutting the amount of code people have to read themselves.
07Anthropic merges Claude Cowork and chat into one ClaudeOn September 16 Anthropic folded Claude Cowork and chat into a single conversation and launched Claude Docs and Claude Slides. Deciding where a task belongs is now Claude's call, not yours.
08Google Research Unveils R4T Set-Retrieval ModelGoogle Research on September 15 published Retrieve-for-Train, a framework that returns search results as one coherent set, alongside its ICML 2026 paper. Running reinforcement learning once to teach a small diffusion model made query fan-out 12 to 20 times faster.
09James Manyika Publishes Overview of Google's 20 Years of Language AIGoogle published an overview of two decades of language AI research on September 15 under the name of SVP James Manyika, covering technology that now reaches 300 languages and 7 billion people. Its backbone is models that process audio directly instead of translating text, and language data recorded by the communities themselves.
10Sakana AI Announces Sakana Marlin UpdateSakana AI added Interactive Reading and PowerPoint export to its research agent Sakana Marlin on September 16. Click a citation and the AI points to the supporting passage in the source, and research findings now come out as editable slides.