Google released an update to its open-weight Gemma 4 model that improves performance on Nvidia Hopper GPUs, fixes tool calling bugs, and addresses truncated response issues, all shipped under the same model name (The Decoder). The update addresses reliability gaps in production deployments without requiring model redownload or version management overhead for practitioners running the model locally.
xAI open-sourced its command-line build tool “Grok-Build” on GitHub under the Apache 2.0 license following disclosure of a security incident in which the tool silently uploaded entire directories to Google Cloud, including SSH keys and password databases (The Decoder). The 844,530-line Rust codebase is now publicly available; xAI committed to deleting previously uploaded user data. In separate research, OpenAI’s internal GPT-Red model found successful attacks against its own systems in 84 percent of test scenarios through self-play training, compared to 13 percent success from human red teamers, with results feeding into hardening of models like GPT-5.6 Sol (MIT Technology Review).