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Sebastian Raschka

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  • Focusing on Post-Training

    Why I'd invest in post-training existing open-weight LLMs, with Fireworks' Ember-1 as an example of more token-efficient reasoning.

    Sebastian Raschka2 min read
  • Pacing != Pacing Development

    My take on AI model pacing as a framework for release checks and the competitive pressure around model releases.

    Sebastian Raschka1 min read
  • 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
  • Reasoning Models From Scratch: Code Setup

    A short video on how conventional LLMs relate to reasoning models and agents, along with Python and PyTorch setup using uv.

    Sebastian Raschka1 min read
  • Two Live Book Club Q&As on September 3

    Two free live book club Q&A sessions on September 3 about Build a Reasoning Model From Scratch and related reader questions.

    Sebastian Raschka1 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
  • How Claude's Text Watermarking Works

    Short illustration of how Claude's text watermarking is supposed to work based on Anthropic's released materials.

    Sebastian Raschka2 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
  • 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

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