News — 2026-05-29

Anthropic announced a modest upgrade to its flagship Claude Opus model, moving from version 4.7 to 4.8, and said it is close to making its high‑security Mythos‑Preview model available to all customers. Currently limited to a consortium of partners under Project Glasswing, Mythos is being held back to allow time for stronger cyber safeguards. Experts note the model’s ability to uncover vulnerabilities quickly, its steep operational cost, and the heightened stakes that come with broader deployment. Read more

Researchers discovered that even after fine‑tuning with documents that flag statements as false, large language models (LLMs) continue to accept those statements as true in the majority of cases. The models showed an 88.6% belief rate for false claims, and only modest improvement when specific corrections were applied. The phenomenon, dubbed “negation neglect,” also appeared when models were trained on texts that either encouraged or discouraged misaligned behavior, with no measurable difference in outcomes. Read more

CNN filed a copyright infringement lawsuit against San Francisco‑based Perplexity AI in a New York District Court, accusing the search engine of copying more than 17,000 of the network's stories, videos, images and other content. The suit follows failed licensing talks and joins a wave of legal actions by publishers against AI firms. Perplexity’s chief communications officer counters that facts cannot be copyrighted, citing the U.S. Copyright Office’s stance. The case highlights a growing clash between news organizations seeking compensation for scraped content and AI companies defending their training methods. Read more

Enterprise‑search startup Glean announced that its annual recurring revenue has reached $300 million, a three‑fold increase from a year ago. The San Francisco firm attributes the surge to its “context graph” technology, which it says slashes AI token usage and lowers customers’ AI bills. With tech giants such as Google, Microsoft and OpenAI now entering the market, Glean’s CEO Arvind Jain says the company’s early‑mover advantage and focus on cost efficiency are paying off. Read more