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Beam: Reflection's 501B open-weight model
Leading today: Beam: Reflection's 501B open-weight model. Also in this issue: Our approach to EU text provenance rules; Building advertising for the way people use AI. 15 stories in total, selected automatically from 62 candidates across the day's feeds.

| 1 | reflection.ai Beam: Reflection's 501B open-weight modelMake intelligence open and accessible to all (Trending on Hacker News (332 points, 94 comments)) |
| 2 | openai.com Our approach to EU text provenance rulesHow OpenAI is approaching text watermarking under EU rules. Learn where watermarks apply, how detection works, and why access starts with researchers. |
| 3 | openai.com Building advertising for the way people use AIOpenAI introduces a new visual ad format in ChatGPT and expands measurement tools, attribution partnerships, and brand suitability for advertisers. |

We are sharing two candidate magnets for next-generation computer memory, found by a team of Claude Opus 5.5 agents.
Read →Aleph Alpha has released Kolibri, a German-English mixture-of-experts model with 78 billion parameters, about three billion of which are active per token. Over 21 percent of the training data is German.
Read →Together AI has released Together Link, a free, MIT-licensed CLI that connects Claude Code, Codex, OpenCode, Pi, and the Claude and ChatGPT desktop apps to open models like Kimi K3 and GLM 5.3.
Read →Reflection AI has introduced Beam, its first open-weight model. It is a 501B sparse Mixture-of-Experts model with 23B active parameters, built for coding and agentic work.
Read →One transformer ran candidate generation and ranking in Yandex Music's A/B test without hand-engineered features, lifting likes 11.42%.
Read →67 Countries Launch 184 Sovereign AI Projects Amid Global Race 조선일보
Read →
Over the summer I talked to the CEO of Springboards, a startup building an LLM that’s designed to come up with a wider variety of responses than its mainstream rivals do.
Read →Voters are already voting in the midterms. This year, some voters are trying something new to get ready for the election: asking AI to help research their ballot and even decide who to vote for.
Read →Cantina Security, with Yeta Labs, has released apex-flash-1, an open-weights model trained specifically for vulnerability research.
Read →A long-standing goal of AI is a model that can continually learn and improve itself. On post-trained models, supervised finetuning (SFT) on new data often causes poor generalization and catastrophic forgetting.
Read →Feature pyramid methods, from FPN to BiFPN, have achieved strong performance in face detection by fusing multi-scale features.
Read →High-quality child care in early life is a critical determinant of children's growth and development. Research on child care quality has been constrained by fragmented, non-research-friendly, and privacy-bound datasets.
Read →The AI industry, condensed into a five minute read. Free, and you can leave whenever.
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