Learn how to dramatically reduce AI model customization timelines from months to days using Amazon SageMaker AI in this 48-minute conference talk from AWS re:Invent 2025. Discover the streamlined process for customizing popular models including Amazon Nova, Llama, Qwen, DeepSeek, and GPT-OSS using advanced techniques like reinforcement learning and direct preference optimization through an intuitive interface. Explore the preview AI agent-guided workflow that enables natural language commands for synthetic data generation, data quality analysis, and automated model training and evaluation in a completely serverless environment. Gain practical insights into accelerating your model customization journey and reducing time to production for AI applications.