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OpenLIT — OpenTelemetry-native observability and evaluation for LLM, tool, and coding-agent workflows

OSS health 100
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Stars
2,770
Primary language
TypeScript
License
Apache-2.0
Repository last updated
Sep 17, 2026

Overview

OpenLIT is an Apache-2.0 AI observability and evaluation platform that traces LLM calls, prompts/responses, tools, retrieval, memory, agent steps, tokens/costs, errors, and evaluations through OpenTelemetry. It also observes coding agents such as Claude Code, Cursor, and Codex. The latest release as of September 17, 2026 is 2.1.0.

Features and best fit

Based on official documentation; not hands-on tested · Content checked:

Trace full agent workflows instead of treating each LLM call as an isolated event

OpenLIT represents prompts/responses, tool calls, retrieval, embeddings, memory, sub-agents, token usage, cost, errors, and evaluations as OpenTelemetry telemetry, making root-cause investigation possible across the complete workflow.

Sources: [2]

Instrument Claude Code, Cursor, and Codex sessions from the CLI

Its coding-agent instrumentation can capture prompts, LLM calls, tools, file reads and edits, shell commands, searches, sub-agent activity, token usage, cost, and code impact from supported agent sessions.

Sources: [2]

Version 2.1.0 adds stuck-loop detection and trace governance

OpenLIT 2.1.0 detects repeated tool calls as stuck-agent loops and reports wasted tokens and cost. It also adds trace governance, coding-agent security checks, policy packs for NIST AI RMF, the EU AI Act, and OWASP ASI, plus Governance Passport export.

Sources: [3]

For teams operating AI or coding agents that need tool-level debugging, cost analysis, and quality evaluation

It is a strong fit when an agent spans multiple providers and frameworks and teams need to identify which prompt, tool, retrieval, or sub-agent caused a failure while keeping telemetry compatible with OpenTelemetry infrastructure.

Treat agent telemetry as sensitive data

Coding-agent observability can capture prompts, LLM traffic, file operations, and shell commands. Assume source code, secrets, or personal data may enter telemetry and design export destinations, retention, access controls, and redaction accordingly.

Sources: [2]

The default Compose stack exposes ClickHouse and OTLP ports and includes fallback database credentials

The repository Compose file exposes ClickHouse on 9000/8123, OpenLIT on 3000, and OTLP on 4317/4318, with default database user/password values. Change credentials and design network exposure, TLS/authentication, and volume backups before shared or production use.

Sources: [4][3]

Official sources

  1. [1]openlit/openlit — GitHub repository metadata(2026-09-17)
  2. [2]OpenLIT — README(2026-09-17)
  3. [3]OpenLIT 2.1.0 — release(2026-09-17)
  4. [4]OpenLIT — docker-compose.yml(2026-09-17)
Supplemental curator note

Its differentiation is tracing tools and coding-agent activity, not only LLM calls. Treat telemetry as sensitive data and design retention and access controls accordingly.

Try it in 3 steps

  1. 1

    Get the source

    git clone --depth 1 https://github.com/openlit/openlit.git
  2. 2

    Enter the repository

    cd openlit
  3. 3

    Check the official steps

    Continue with the commands in the README Installation, Quick Start, or Getting Started section.

    find . -maxdepth 1 -iname 'README*' -exec sed -n '1,220p' {} \; -quit
Check the official README

Growth

Growth trends · Last 30 days

2,770 Stars

Trend data is still being collected.

Development activity

Last 90 days · weekly

Commits (last 30 days)
51
Open PRs
25

Development activity is still being collected.

Built with

Categories and tags

GitHub data

GitHub dataView detailed GitHub data

GitHub Topics

  • observability
  • llmops
  • ai-observability
  • openai
  • clickhouse
  • genai
  • opentelemetry
  • open-source
  • gpu-monitoring
  • amd-gpu
  • nvidia-smi
  • ai-engineering
Stars
2,770
Forks
387
Watchers
20
Open issues
42
Primary language
TypeScript
License
Apache-2.0
Repository last updated
Sep 17, 2026
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