Google Cloud Introduces Managed Reinforcement Learning Fine-Tuning for Gemini Models

Google Cloud has launched a managed reinforcement learning fine-tuning service (RLFT) that lets customers adapt Gemini models using a reward function they define instead of labeled answers.

Users supply prompts and a reward function, while Google handles the RL infrastructure and proprietary model internals.

The guide advises exhausting prompting and supervised fine-tuning first, and notes that RLFT suits tasks that are easy to score but hard to demonstrate.