JAX

Open-source blueprint for training a Claude Code-like agent in pure JAX on TPUs, detailing model sizes, cost, data/engineering steps, and Constitutional AI alignment.

The piece reframes AI-assisted coding as a spectrum from Cathedral/Bazaar to a new Winchester Mystery House model, arguing cheap, idiosyncratic code changes the feedback loop and tooling needs, backed by concrete data on commits, PRs, and project examples.

AWS Trainium3 unveils switched-scale-up rack architectures (NL32x2 Switched and NL72x2 Switched) with Gen1/Gen2/Gen3 switch trays, advancing memory bandwidth and per-TCO performance while expanding software openness and ecosystem bets to challenge Nvidia and AMD in the datacenter AI race.