The Frontier edition

The Frontier · 3 Sep 2026

3 Sep 2026 · 15 articles

llm-gemini 0.34

Release: llm-gemini 0.34 New model gemini-3.8-flash for Gemini 3.8 Flash , with low, medium and high thinking levels. #146 Fixed async responses failing to record the resolved model version. Thanks, Charlie Tonneslan . #137 Google released Gemini 3.8 Flash (and 3.8 Flash Cyber, but that's available to "trusted defenders" only) today. Here are the pelicans for high, medium, and low. This is high…

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

Claude's new system prompt really doesn't want to reproduce song lyrics

Anthropic publish the system prompts for their Claude consumer applications ( Claude.ai and the Claude mobile apps - sadly not for Claude Cowork or Claude Code). I love that they do this, and that they share not just the current prompts but historic changes to their prompts as well. They used to keep all of the prompts on a single page, but when I checked today I noticed they had re-arranged…

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

Quasar 438B: Europe's Leading AI Model

Article URL: https://multiversecomputing.com/resources/introducing-quasar-438b-europe-s-leading-ai-model Comments URL: https://news.ycombinator.com/item?id=49534132 Points: 167 # Comments: 106

Summary published by Hacker News - Newest: "AI" · 2 Sep 2026 · Read the original ↗

Claude Fable 5.1 made me a really nice animated pelican

Today is Claude Fable (and Mythos) 5.1 day . Anthropic say that Fable 5.1 "sets a new standard for coding, knowledge work, and long-running problem-solving tasks". Their announcement spends a notable amount of time on scientific research, boasting of a 52.6% score on the brand new Terminal-Bench-Science 0.1 benchmark (first announced on August 27th ), up from 24.7% for Fable 5, 29.0% for Opus 5…

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

Codex bundles LibreOffice

I was poking around in my ~/.cache/ folder using OmniDiskSweeper when I spotted something interesting. The OpenAI Codex desktop app (since rebranded to just ChatGPT) has 1.7GB of stuff in there in a folder called codex-primary-runtime , including a full Python installation, a full Node.js installation, and native binaries for Poppler , git, and the LibreOffice open source office suite (which…

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

Understanding ChatGPT Work

OpenAI announced ChatGPT Work on July 9th, and have been furiously iterating on it ever since. It is an extraordinarily confusing and very powerful product. Here's what I've figured out about it so far. ChatGPT Work is actually two products The more interesting version of ChatGPT Work is the one that runs in the cloud. This can be accessed via chatgpt.com or through the ChatGPT mobile apps. Let's…

Summary published by Simon Willison's Weblog · 30 Aug 2026 · Read the original ↗