Helicone AI

Helicone AI serves as an open-source observability platform and API gateway built specifically to monitor, debug, and optimize large language model applications. By acting as a proxy between client applications and major model providers like OpenAI, Anthropic, and Azure, the platform logs real-time request metrics, latency figures, token counts, and API costs without requiring complex code refactoring. Developers can monitor application usage, implement custom caching rules, rate-limit specific endpoints, and execute prompt experiments directly within a central management dashboard. Detailed session analytics and error logging features allow technical teams to pinpoint failing requests, trace complex agent chains, and debug unexpected outputs efficiently. Furthermore, built-in threat detection and export tools help engineering teams maintain security compliance while scaling their production environments. While integrating non-standard or custom-hosted language models may require manual proxy configuration, Helicone provides robust visibility into commercial API usage, empowering teams to reduce operational expenses and improve overall application reliability across fast-growing software ecosystems.