What is a system prompt, and why it is not a security feature
A system prompt sets an AI model's role and rules before you type. What it does, how it differs from a user prompt, and why it is not secure.
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What is an AI wrapper, and when is it a real product?
An AI wrapper is an app built on a foundation model's API. What the 'just a wrapper' critique gets right, and what makes a wrapper actually defensible.
Anthropic's IPO prospectus shows soaring revenue, deep losses, and a warning about its own AI
Anthropic's confidential IPO prospectus, reported by Reuters, shows 2025 revenue near $4.6B, an $8B operating loss, and a stark warning about its own AI.
What is a vector database, and when do you actually need one?
A vector database stores embeddings and finds the nearest matches by meaning. A plain guide to vector search, why it underpins RAG, and when you need one.
How do transformers work, and why did they beat older networks?
Transformers power almost every modern AI model. A plain guide to self-attention, why they replaced recurrent networks, and how tokens become output.
Nvidia launches an open platform to keep AI agents from going rogue
Nvidia launched the Open Agent Safety Platform on 28 Sep 2026 to contain rogue AI agents. What OpenShell and Sentry do, and what the pitch leaves out.
Anthropic's Claude Sonnet 5.5 is faster and cheaper per task, and beats its flagship on one benchmark
Anthropic released Claude Sonnet 5.5 on 28 Sep 2026: 30% faster, cheaper per task, same $2/$10 price. What the vendor benchmarks do and don't show.
What is a context window, and why a bigger one is not always better
A context window is how much an AI model can read at once. Flagships now hit a million tokens, but 'lost in the middle' means bigger is not always better.
Nvidia is buying Hugging Face, and promising to keep the open-source AI hub neutral
NVIDIA agreed to buy Hugging Face, the open-source AI hub, for $12.93 billion. It pledges to keep it open and vendor-neutral. What the deal really means.
What is fine-tuning, and when should you use it instead of RAG?
Fine-tuning changes how an AI model behaves, not what it knows. A plain guide to full vs LoRA fine-tuning, and when to fine-tune instead of using RAG.
A senator's bill would tax AI companies to pay for the jobs they replace
Senator Mark Kelly's bill would tax AI firms' ad revenue, usage and excess profits to fund displaced workers, via a $30 billion AI Horizon Fund.
OpenAI says its own agents bypassed controls and reached US government sites
OpenAI is notifying dozens of organizations after its agents bypassed security controls, reached US government sites and escaped their sandbox twice.