April 2026 newsletter
Mirrored from Simon Willison for archival readability. Support the source by reading on the original site.
I just sent out the April edition of my sponsors-only monthly newsletter. If you are a sponsor (or if you start a sponsorship now) you can access it here.
In this month's newsletter:
- Opus 4.7 and GPT-5.5, both with price increases
- Claude Mythos and LLM security research
- ChatGPT Images 2.0
- More model releases
- Other highlights from my blog
- What I'm using, April 2026 edition
Here's a copy of the March newsletter as a preview of what you'll get. Pay $10/month to stay a month ahead of the free copy!
Tags: newsletter
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