OpenLIT – Open-Source LLM Observability with OpenTelemetry
Hey HN, we're super excited to share something we've been working on: OpenLIT. After an engaging preview that some of you might recall, we are now proudly announcing our first stable release! *What's OpenLIT?* Simply put, OpenLIT is an open-source tool designed to make monitoring your Large Language Model (LLM) applications straightforward. It’s built on OpenTelemetry, aiming to reduce the complexities that come with observing the behavior and usage of your LLM stack. *Beyond Basic Text Generation:* OpenLIT isn’t restricted to just text and chatbot outputs. It now includes automatic…
OpenLIT – Open-Source LLM Observability with OpenTelemetry launched on April 26, 2024 with 62 votes, #640 of 4,347 launches that month and more than 90% of that year's launches. The site was still online in September 2026, 2 years on.
In plain words
OpenLIT is an open-source observability tool built on OpenTelemetry for monitoring Large Language Model applications. It provides automatic monitoring across multiple modalities including text generation, GPT-4 Vision, DALL·E, and OpenAI Audio through a single platform. The tool is designed to simplify observing LLM behavior and usage patterns, reducing complexity in multimodal LLM projects. It is for developers building and managing LLM applications who need monitoring and insights across their LLM stack.
written from the facts on this page · September 2026
From the sources
Open-source observability & evaluation platform for AI agents and coding agents. Trace LLMs, tools, prompts, costs & agent workflows with OpenTelemetry. - openlit/openlit
In the maker’s words, at launch
Hey HN, we're super excited to share something we've been working on: OpenLIT. After an engaging preview that some of you might recall, we are now proudly announcing our first stable release! *What's OpenLIT?* Simply put, OpenLIT is an open-source tool designed to make monitoring your Large Language Model (LLM)…
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