# Google dropped two things into its open-source AI stack. Only one was announced. - slug: google-dropped-two-things-into-its-open-source-ai-stack-only-one-was-announced - date: 2026-04-18 - category: Agentics MaxText v0.2.1 brought reinforcement learning to single-machine TPU configs on April 16. The multi-machine version shipped quietly in December. Google’s blog post does not mention December. ---