A busy day for open-weight models, with Mistral and Reflection both announcing large releases, alongside Google’s new on-device multimodal embeddings, OpenAI’s computer-use research and a batch of mathematical results, plus notes on agent harness design and Git infrastructure.
From the labs
- Introducing Mistral Large 4 — Mistral AI (+ Simon Willison)
- Introducing Beam: Reflection’s 501B open-weight model — Reflection
- EmbeddingGemma 2: an open, lightweight multimodal embedding model — Google
- Advancing computer use with Ironclad — OpenAI
- Sharing AI progress in mathematics — OpenAI
Worth your time
- What is Codemode — Armin Ronacher
- Building Git infrastructure for agent-scale development — GitHub