Build SDK integrates with reward-kit for Reinforcement Fine-Tuning evaluators

The Build SDK now natively integrates with reward-kit to simplify evaluator development for Reinforcement Fine-Tuning (RFT). You can now create custom evaluators in Python with automatic dependency management and seamless deployment to Fireworks infrastructure.

Key features:

• Native reward-kit integration for evaluator development
• Automatic packaging of dependencies from pyproject.toml or requirements.txt
• Local testing capabilities before deployment
• Direct integration with Fireworks datasets and evaluation jobs
• Support for third-party libraries and complex evaluation logic

See our Developing Evaluators guide to get started with your first evaluator in minutes.