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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.

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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

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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