Google Unveils gemma-trainer Skill to Let AI Agents Guide Fine-Tuning of Gemma 4 Models

Google has introduced gemma-trainer, an agent-assisted "skill" designed to make fine-tuning its Gemma 4 open-weight models accessible to a much broader range of developers. The tool lets coding agents configure training runs, manage execution, and evaluate results, lowering the barrier to customizing models that previously required substantial machine-learning expertise.