Published onFebruary 11, 2026What is Helicone? The Guide to LLM Observability in 2026heliconellm-observabilityai-analyticsprompt-engineeringopenai-monitoringopen-source-toolsHelicone is an open-source observability platform for LLMs that tracks API costs, latency, and usage patterns to help developers optimize and debug AI performance.