It's a big one

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intermediate Published 24 Apr 2026

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Learn about Simon Willison's newsletter and blog featuring LLM developments, Agentic Engineering, and secure dependency-aware engineering with SonarQube Advanced Security

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Title: It's a big one

URL Source: https://simonwillison.net/2026/Apr/24/weekly/

Published Time: Fri, 24 Apr 2026 04:15:14 GMT

Markdown Content:
# It's a big one

# [Simon Willison’s Weblog](https://simonwillison.net/)

[Subscribe](https://simonwillison.net/about/#subscribe)

**Sponsored by:** Sonar — Now with SAST + SCA for secure, dependency-aware Agentic Engineering. [SonarQube Advanced Security](https://fandf.co/4bzyODl)

24th April 2026

[This week's edition](https://simonw.substack.com/p/gpt-55-chatgpt-images-20-qwen36-27b) of my email newsletter (aka [content from this blog](https://simonwillison.net/2023/Apr/4/substack-observable/) delivered to your inbox) features 4 pelicans riding bicycles, 1 possum on an e-scooter, up to 5 raccoons with ham radios hiding in crowds, 5 blog posts, 8 links, 3 quotes and a new chapter of my Agentic Engineering Patterns guide

Posted [24th April 2026](https://simonwillison.net/2026/Apr/24/) at 4:09 am

## Recent articles

* [Extract PDF text in your browser with LiteParse for the web](https://simonwillison.net/2026/Apr/23/liteparse-for-the-web/) - 23rd April 2026
* [A pelican for GPT-5.5 via the semi-official Codex backdoor API](https://simonwillison.net/2026/Apr/23/gpt-5-5/) - 23rd April 2026
* [Is Claude Code going to cost $100/month? Probably not - it's all very confusing](https://simonwillison.net/2026/Apr/22/claude-code-confusion/) - 22nd April 2026

This is a **note** by Simon Willison, posted on [24th April 2026](https://simonwillison.net/2026/Apr/24/).

[newsletter 17](https://simonwillison.net/tags/newsletter/)
### Monthly briefing

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