Claude in Chrome can read and compare what is open in your tabs and pull details into a table; Anthropic’s own red-team numbers explain why it asks before purchases and why you should finish checkout.
OpenAI’s Instant Checkout lets you ask ChatGPT a shopping question, pick an item and confirm the order in chat; the open Agentic Commerce Protocol passes the order to the merchant.
Perplexity pitches Comet for jobs like finding the same item with faster shipping. Brave showed a hidden comment could hijack it, and Simon Willison advises stopping agents at checkout.