The Weights & Biases toolkit for LLM applications, automatically versioning prompts, code and datasets as objects and tracking every call for comparison and scoring.
Source: Official GitHub repository. Last checked 2026-09-18. Spot an error? Tell us.
Nearby and similar
An observability and evaluation platform that turns production traces into datasets and prompt improvements, marketed for teams running self-improving agents.
An open-source workspace where engineers and subject-matter experts iterate on prompts and agent configurations side by side, with versioning, evaluation runs and observability.
Arize's commercial platform for agent observability and evaluation, adding hosted tracing, online evaluators and issue tracking on top of the open-source Phoenix project.
Arize's open-source observability tool that runs locally or self-hosted, offering OpenTelemetry tracing, a prompt playground with saved prompt versions and built-in evaluators.
An evaluation and observability platform for AI products, with a prompt playground, dataset management, scorers and production tracing in one workspace.
An open-source visual environment for stress-testing prompts. Prompt variants, models and evaluators are wired together as nodes, and results are compared in charts and tables.