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  • OpenAI Astra and Looped Transformers

    A short note on OpenAI Astra, recurrent depth, looped transformers, Nanbeige 4.2, and the Mixture-of-Recursions paper.

    Sebastian Raschka3 min read
  • GLM-5.3-Flash Architecture Notes

    Architecture note on GLM-5.3-Flash, formerly Ox Alpha, covering its KDA and MLA/DSA hybrid attention, sparse MoE backbone, and four-stream mHC residual path.

    Sebastian Raschka1 min read
  • Muse Glimmer 30B Architecture Notes

    Short architecture note on Meta Muse Glimmer 30B, including gated local and global GQA, KV-cache efficiency, and release-time benchmark comparisons.

    Sebastian Raschka2 min read
  • Tracking Secrets Through an Agent Run

    How Sim tracks the secrets an agent run actually uses, carries that provenance across tools and storage, redacts values at every egress boundary, and records which run touched which credential.

    Sim Blog8 min read
  • The Agent Is Just Another Peer

    How we let an AI agent write into a live collaborative document by making it an ordinary Yjs peer, and the things that turned out to be easy, hard, and surprising.

    Sim Blog11 min read
  • Kimi K3 Architecture Notes

    Short architecture note on Kimi K3, including LatentMoE, Kimi Delta Attention, Attention Residuals, NoPE, multimodality, and inference-efficiency choices.

    Sebastian Raschka2 min read
  • A Few Notable Open-Weight Models This Week

    Short note on the architectures of six new open-weight models, including Nanbeige 4.2, Laguna S 2.1, Motif-3-Beta, Solar Open 2, Antares 1B, and BTL-3.

    Sebastian Raschka3 min read
  • The browser agent stack, explained

    The browser agent stack, mapped layer by layer: model, harness, browser drivers, engine. Lightpanda covers three of the four in a single binary.

    Lightpanda Blog7 min read
  • What Is a Business Agent?

    Chatbots respond, copilots assist, and RAG systems retrieve. Business agents take actions, plan workflows, call external systems, and know when to stop and ask. Six architectural properties separate the category from everything else.

    Jitera Blog8 min read

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