Category
LLM evals & observability — traces, scoring, live monitoring
Treat LLM apps like production systems: offline evals, live traces, and metrics at scale. This hub covers major eval/observability platforms and OSS options.
The gap between “I tuned this prompt once” and “I can ship a change and watch 200 regressions pass plus P99 latency stay flat” is filled by this category. Key comparisons: custom scorer support, unified **trace + eval + replay**, and whether offline/online share one dataset. Depth of LangChain/LlamaIndex/OpenAI SDK integration is another frequent deciding factor.
Editorial / GSC add-ons
LangSmith vs Langfuse vs Braintrust
LangSmith leans into LangChain; Langfuse is self-hostable OSS; Braintrust is eval-first. Run one real pipeline through two of them for two weeks and see which tab engineers actually open.
How do I eval a RAG stack?
Typically retrieval metrics (recall/precision/nDCG) + generation scores (correctness, faithfulness, groundedness), topped with human spot-checks. Look for built-in LLM-as-judge and golden dataset management.
Monitoring LLMs in production
Track P50/P95 latency, token cost distribution, failure rate, and PII leakage. Confirm log retention and training-use clauses on each vendor site.
Tools in this category
Summaries and official links live on each tool page—browse related picks in-category.
LangChain’s eval and trace platform for LLM apps—datasets, scorers, live monitoring, and human review with the deepest LangChain/LangGraph integration.
Open-source LLM observability and eval platform with traces, datasets, scorers, and prompt management—self-host via Docker to keep data on your own network.
Braintrust: popular AI product—see the official site for features, pricing, supported regions, data handling, and latest model lineup.
Arize Phoenix: popular AI product—see the official site for features, pricing, supported regions, data handling, and latest model lineup.
Helicone: popular AI product—see the official site for features, pricing, supported regions, data handling, and latest model lineup.
Galileo: popular AI product—see the official site for features, pricing, supported regions, data handling, and latest model lineup.
Patronus AI: popular AI product—see the official site for features, pricing, supported regions, data handling, and latest model lineup.