Hacker Newsroom AI for 13 April: Anthropic Cache TTL, AI Violence Backlash, European AI Playbook, ChatGPT Study Mode

Hacker Newsroom AI for 13 April recaps 5 major AI Hacker News stories, moving through anthropic cache ttl, ai violence backlash, european ai playbook, chatgpt study mode. 1. Anthropic Cache TTL The next story covers an Anthropic Claude Code issue claiming the cache TTL quietly shifted back to five minutes in early March, which matters because it could drive up costs, burn through quotas faster, and make long coding sessions less usable. Hacker News mostly reads it as evidence of a server-side regression or cost-saving move, while others debate the misleading title, the size of the impact, and whether model quality has been slipping more broadly. Story link Hacker News discussion 2. AI Violence Backlash The next story is about an essay warning that AI leaders and the backlash around job loss could spill into violence, and it matters because the author says the risk stops being abstract once people feel shut out of the future. The comments split fast: some readers said the piece overstates the role of Altman and Amodei, while others argued that the anger comes from real disruption and bad incentives, not just rhetoric. Story link Hacker News discussion 3. European AI Playbook The next story is Mistral’s “European AI. A playbook to own it,” a policy-heavy piece arguing that Europe should move faster on talent, infrastructure, regulation, and funding so it can build and keep a competitive AI sector on its own terms. Story link Hacker News discussion 4. ChatGPT Study Mode The next story is about OpenAI silently removing Study Mode from ChatGPT, and the post says the feature disappeared without warning; that matters because people treat these modes like real learning tools, and they can vanish overnight. The Hacker News reaction splits between people saying it was probably just a system prompt and could be recreated, and people arguing that a useful feature is still a useful feature even if the implementation is simple. Hacker News discussion 5. Tech Valuations Are Back Pre The next story says tech valuations are back to pre-AI boom levels, based on Apollo's chart comparing forward P/E ratios for the S&P 500 and the S&P 500 Information Technology sector. It matters because the piece is arguing that the AI-fueled valuation surge has already cooled, even though the biggest tech names are still priced for a lot of future growth. Story link Hacker News discussion That's it for today, I hope this is going to help you build some cool things.