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Simon Willison's April newsletter covers new models like Opus 4.7 and GPT-5.5

By PulseAugur Editorial · [2 sources] ·

Simon Willison's April 2026 newsletter highlights upcoming price increases for Opus 4.7 and GPT-5.5, alongside new releases like Claude Mythos and ChatGPT Images 2.0. The newsletter also touches on LLM security research and other model advancements. Additionally, it features an article discussing the refactoring of LLM 0.32a0 and the historical context of the OpenAI Microsoft AGI clause. AI

IMPACT Anticipates price changes for key models and new product features, impacting user costs and capabilities.

RANK_REASON The cluster discusses multiple model releases and research papers, fitting the 'research' bucket.

Read on Simon Willison →

AI-generated summary · Google Gemini · from 2 sources. How we write summaries →

Simon Willison's April newsletter covers new models like Opus 4.7 and GPT-5.5

How we ranked this

Signal score
0 / 100
Composite score across the factors below. Higher = stronger signal that this story matters right now.
Newsworthiness bucket
Research
The cluster discusses multiple model releases and research papers, fitting the 'research' bucket.
Source corroboration
2 independent sources
Multiple independent publishers reporting the same story raises confidence that it's real and newsworthy.
Topics
model release, product, paper
Editorial topic classification. Feeds into how the story surfaces on /topic/<slug> hub pages and into the per-entity coverage mix.
AI-industry relevance
High
Clearly on-topic for AI-industry coverage.
Story freshness
145 days old
Aged out of breaking-news scoring windows; ranking reflects the durable signal from the full source set.

Full methodology in our editorial standards.

COVERAGE [2]

  1. Simon Willison TIER_1 English(EN) ·

    April 2026 newsletter

    <p>I just sent out the April edition of my <a href="https://github.com/sponsors/simonw/">sponsors-only monthly newsletter</a>. If you are a sponsor (or if you start a sponsorship now) you can <a href="https://github.com/simonw-private/monthly/blob/main/2026-04-april.md">access it…

  2. LessWrong (AI tag) TIER_1 (LT) · nomagicpill ·

    April 2026 Links

    <p><span>Everything I read in April 2026, ordered roughly from most to least interesting:</span></p><ul><li value="1"><a href="https://www.lesswrong.com/posts/dqc8WCQuHaDGBmti4/automated-deanonymization-is-here"><span>Automated Deanonymization is Here</span></a><span>: Stylometry…

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