The Frontier edition

The Frontier · 5 Oct 2026

5 Oct 2026 · 8 articles

We're going to need default hard budget caps on pretty much everything

Here's a product feature which the world is going to need a whole lot more of over the coming months and years: default hard budget caps . I'm talking about the feature of pay-by-usage services and APIs that lets you say "after $X/month, cut this thing off and return errors". These need to be hard limits. Soft caps, "after $X/month, send me a warning email", will not cut it. Coding agents, and…

Summary published by Simon Willison's Weblog · 3 Oct 2026 · Read the original ↗

September sponsors-only newsletter

I just sent the September edition of my sponsors-only monthly newsletter . If you are a sponsor (or start a sponsorship now) you can access it here . This month: More Fable class models A pricing war 3D graphics, Blender, and pixel art LLMs come for mathematics So many more accidental cyberattacks The vulnapocalypse comes for Datasette What I'm using right now My software releases this month 2026…

Summary published by Simon Willison's Weblog · 3 Oct 2026 · Read the original ↗

Rex's Dino Store

Museum: Rex's Dino Store Located just before the turnstiles in the Grand Army Plaza subway station at the north end of Brooklyn's Prospect Park is this former newsstand which is now operated by a dinosaur. The density of dinosaur puns is exceptional . Tags: art , new-york

Summary published by Simon Willison's Weblog · 2 Oct 2026 · Read the original ↗

Quoting Matthew Green

[...] Put these pieces together and you have the two halves of a worm: a payload that hijacks the agent, and an agent that will carry the payload to the next agent. Agents in separately-isolated sandboxes discovered that they could leave instructions for each other in a shared package cache, and those instructions changed what the recipients did. Replace the package cache with email, Slack and…

Summary published by Simon Willison's Weblog · 1 Oct 2026 · Read the original ↗