Build. Experiment. Scale. Now With Open-Source AI Evaluation.
AI is evolving rapidly, but scaling it effectively remains a challenge. Arthur has introduced the Arthur Engine, the first open-source, real-time AI evaluation engine that helps teams monitor, debug, and enhance Generative AI and traditional ML models. With no black-box monitoring, third-party dependencies, or data privacy risks, this solution is now available for free.
Why Real-Time AI Evaluation Matters in 2025
As AI adoption expands, so do the associated risks. Without real-time evaluation, organizations face:
- Data leaks: 8.5% of employee prompts contain sensitive data (Harmonic Security).
- Model degradation: AI models drift over time without continuous monitoring.
- Debugging challenges: Slow iteration cycles result in suboptimal model performance.
The Arthur Engine addresses these challenges by providing instant visibility, real-time guardrails, and on-the-fly model optimization—all within a user's own environment.
“AI is moving fast, and we need to ensure it moves in the right direction. Open-sourcing the Arthur Engine puts powerful AI evaluation tools into the hands of developers, researchers, and builders worldwide.”
What Makes Arthur Engine Different?
Unlike traditional AI monitoring tools, Arthur Engine runs locally, ensuring data sovereignty and eliminating compliance risks.
- Real-Time AI Evaluation: Instantly detect failures before they impact production.
- Active Guardrails: Intervene in real time to prevent hallucinations and inaccurate outputs.
- Customizable Metrics: Tailor evaluations to specific AI use cases.
- Privacy-Preserving & Secure: Keep all data within your infrastructure.
- Works Across All Models: Supports GPT, Claude, Gemini, open-weight models, and traditional ML.
“By open-sourcing Arthur Engine, we’re making AI trust and safety accessible to all developers—allowing them to safeguard AI systems with fully customizable, high-performance monitoring tools.”
AI Evaluation, Built for the Future
The Arthur Engine is part of Arthur’s broader AI performance monitoring suite, designed to help organizations:
- Validate AI outputs in real time
- Detect performance shifts before they become critical issues
- Ensure regulatory compliance and explainability
This open-source release sets a new benchmark for AI transparency, security, and performance monitoring.
Explore Arthur Engine on GitHub
Join the waitlist for the new Arthur Platform
AI is reshaping the world—let’s ensure it performs the way it should.