Cognition raising $1B at $47B valuation 👀

Cognition, an AI startup, is set to raise around $1 billion at a $47 billion valuation, highlighting the massive capital flowing into high-profile AI companies and signaling continued investor confidence in the sector.

Simon Willison's Weblog

Tencent launched Hy4 Preview, a 770B parameter open-weight LLM with 1M context window and integrated reasoning modes, marking a major increase from their previous 295B parameter Hy3 model released just weeks earlier.

GitHub

GitHub Codex's Memories feature was found to transmit private local-provider chat conversations to OpenAI without user consent, with evidence suggesting OpenAI used this improperly obtained data for account moderation actions. The researcher demands a full audit, reversal of affected account actions, and public disclosure of the scope and impact.

Hugging Face

Tencent's ContextPilot-14B teaches AI agents to proactively manage their working memory during complex, multi-turn tasks using fine-grained RL, achieving better performance with more compact contexts than existing methods. The framework introduces planning, long-term memory, and adaptive compression tools alongside novel RL techniques for context management.

OpenAI

OpenAI released Rosalind Workbench, a unified research platform that integrates life science tools, data analysis, and specialized biology models into a single ChatGPT-based environment to help researchers connect fragmented workflows and accelerate discovery across genomics, protein design, and molecular research.