{"adoption": {"forks": 119, "observed_at": "2026-08-28T04:03:53.050817+00:00", "stars": 1178}, "canonical_url": "https://ross.abutalabs.com/products/openevals", "card": {"archived": false, "artifact_type": "library", "description": "Readymade evaluators for your LLM apps", "domain": ["large-language-models", "machine-learning", "developer-tools", "testing"], "enriched": true, "function": ["testing", "llm-inference", "prompt-engineering", "benchmarking"], "health_score": 99, "homepage": null, "language": "Python", "license": "MIT", "license_family": "permissive", "maturity": "active", "member_repos": ["langchain-ai/openevals"], "name": "langchain-ai/openevals", "platform": ["python", "cross-platform"], "pushed_at": "2026-08-20T07:55:05+00:00", "repo": "langchain-ai/openevals", "stars": 1178, "tags": ["llm-evaluation", "llm-as-judge", "evals", "rag-evaluation", "langchain", "nodejs"], "topics": [], "urls": [], "use_cases": ["evaluate llm app outputs for correctness", "run llm-as-judge evaluations", "test rag pipeline answer quality", "check if model responses are concise", "grade llm outputs against reference answers", "build custom evaluators for ai agents"], "what_it_is": "OpenEvals is a library of readymade evaluators for testing LLM applications, including LLM-as-judge evaluators and reference-based/reference-free checks. It is available in both Python and TypeScript and is intended as a starting point for building custom application-specific evals.", "when_to_avoid": ["you need agent-trajectory-specific evaluation (use agentevals instead)", "you need deterministic unit tests without an LLM judge", "you need a full eval orchestration platform rather than evaluator primitives"], "when_to_choose": ["you need off-the-shelf evaluators for LLM app testing", "you want LLM-as-judge scoring with minimal setup", "you use LangChain/LangSmith and want compatible evals"]}, "data_as_of": "2026-08-30T08:39:29.467469+00:00", "members": [{"path": "/products/openevals", "repo": "langchain-ai/openevals", "role": "main", "score": 86}], "provenance": {"archived": {"kind": "observed", "observed_at": "2026-08-28T04:03:53.050817+00:00", "source": "github"}, "artifact_type": {"confidence": null, "enriched_at": "2026-08-30T06:26:06.985589+00:00", "kind": "inferred", "prompt_version": 1, "sources": [{"content_hash": "dde0264402e1f7be7e98ccfa5351c878bcaaa5395752e8333e6d28e1350e7a0f", "fetched_at": "2026-08-28T04:03:53.050817+00:00", "kind": "readme", "missing": false, "url": "https://github.com/langchain-ai/openevals"}], "taxonomy_version": 1}, "description": {"kind": "observed", "observed_at": "2026-08-28T04:03:53.050817+00:00", "source": "github"}, "domain": {"confidence": null, "enriched_at": "2026-08-30T06:26:06.985589+00:00", "kind": "inferred", "prompt_version": 1, "sources": [{"content_hash": "dde0264402e1f7be7e98ccfa5351c878bcaaa5395752e8333e6d28e1350e7a0f", "fetched_at": "2026-08-28T04:03:53.050817+00:00", "kind": "readme", "missing": false, "url": "https://github.com/langchain-ai/openevals"}], "taxonomy_version": 1}, "enriched": {"inputs": [], "kind": "computed", "method": "enrichment_status"}, "function": {"confidence": null, "enriched_at": "2026-08-30T06:26:06.985589+00:00", "kind": "inferred", "prompt_version": 1, "sources": [{"content_hash": "dde0264402e1f7be7e98ccfa5351c878bcaaa5395752e8333e6d28e1350e7a0f", "fetched_at": "2026-08-28T04:03:53.050817+00:00", "kind": "readme", "missing": false, "url": "https://github.com/langchain-ai/openevals"}], "taxonomy_version": 1}, "health_score": {"inputs": ["days_since_push", "days_since_release", "archived"], "kind": "computed", "method": "health_v1"}, "homepage": {"kind": "observed", "observed_at": "2026-08-28T04:03:53.050817+00:00", "source": "github"}, "language": {"kind": "observed", "observed_at": "2026-08-28T04:03:53.050817+00:00", "source": "github"}, "license": {"kind": "observed", "observed_at": "2026-08-28T04:03:53.050817+00:00", "source": "github"}, "license_family": {"inputs": ["license"], "kind": "computed", "method": "license_family"}, "maturity": {"confidence": null, "enriched_at": "2026-08-30T06:26:06.985589+00:00", "kind": "inferred", "prompt_version": 1, "sources": [{"content_hash": "dde0264402e1f7be7e98ccfa5351c878bcaaa5395752e8333e6d28e1350e7a0f", "fetched_at": "2026-08-28T04:03:53.050817+00:00", "kind": "readme", "missing": false, "url": "https://github.com/langchain-ai/openevals"}], "taxonomy_version": 1}, "member_repos": {"kind": "observed", "observed_at": "2026-08-28T04:03:53.050817+00:00", "source": "github"}, "name": {"kind": "observed", "observed_at": "2026-08-28T04:03:53.050817+00:00", "source": "github"}, "platform": {"confidence": null, "enriched_at": "2026-08-30T06:26:06.985589+00:00", "kind": "inferred", "prompt_version": 1, "sources": [{"content_hash": "dde0264402e1f7be7e98ccfa5351c878bcaaa5395752e8333e6d28e1350e7a0f", "fetched_at": "2026-08-28T04:03:53.050817+00:00", "kind": "readme", "missing": false, "url": "https://github.com/langchain-ai/openevals"}], "taxonomy_version": 1}, "pushed_at": {"kind": "observed", "observed_at": "2026-08-28T04:03:53.050817+00:00", "source": "github"}, "repo": {"kind": "observed", "observed_at": "2026-08-28T04:03:53.050817+00:00", "source": "github"}, "stars": {"kind": "observed", "observed_at": "2026-08-28T04:03:53.050817+00:00", "source": "github"}, "tags": {"confidence": null, "enriched_at": "2026-08-30T06:26:06.985589+00:00", "kind": "inferred", "prompt_version": 1, "sources": [{"content_hash": "dde0264402e1f7be7e98ccfa5351c878bcaaa5395752e8333e6d28e1350e7a0f", "fetched_at": "2026-08-28T04:03:53.050817+00:00", "kind": "readme", "missing": false, "url": "https://github.com/langchain-ai/openevals"}], "taxonomy_version": 1}, "topics": {"kind": "observed", "observed_at": "2026-08-28T04:03:53.050817+00:00", "source": "github"}, "urls": {"kind": "observed", "observed_at": "2026-08-28T04:03:53.050817+00:00", "source": "github"}, "use_cases": {"confidence": null, "enriched_at": "2026-08-30T06:26:06.985589+00:00", "kind": "inferred", "prompt_version": 1, "sources": [{"content_hash": "dde0264402e1f7be7e98ccfa5351c878bcaaa5395752e8333e6d28e1350e7a0f", "fetched_at": "2026-08-28T04:03:53.050817+00:00", "kind": "readme", "missing": false, "url": "https://github.com/langchain-ai/openevals"}], "taxonomy_version": 1}, "what_it_is": {"confidence": null, "enriched_at": "2026-08-30T06:26:06.985589+00:00", "kind": "inferred", "prompt_version": 1, "sources": [{"content_hash": "dde0264402e1f7be7e98ccfa5351c878bcaaa5395752e8333e6d28e1350e7a0f", "fetched_at": "2026-08-28T04:03:53.050817+00:00", "kind": "readme", "missing": false, "url": "https://github.com/langchain-ai/openevals"}], "taxonomy_version": 1}, "when_to_avoid": {"confidence": null, "enriched_at": "2026-08-30T06:26:06.985589+00:00", "kind": "inferred", "prompt_version": 1, "sources": [{"content_hash": "dde0264402e1f7be7e98ccfa5351c878bcaaa5395752e8333e6d28e1350e7a0f", "fetched_at": "2026-08-28T04:03:53.050817+00:00", "kind": "readme", "missing": false, "url": "https://github.com/langchain-ai/openevals"}], "taxonomy_version": 1}, "when_to_choose": {"confidence": null, "enriched_at": "2026-08-30T06:26:06.985589+00:00", "kind": "inferred", "prompt_version": 1, "sources": [{"content_hash": "dde0264402e1f7be7e98ccfa5351c878bcaaa5395752e8333e6d28e1350e7a0f", "fetched_at": "2026-08-28T04:03:53.050817+00:00", "kind": "readme", "missing": false, "url": "https://github.com/langchain-ai/openevals"}], "taxonomy_version": 1}}, "score": {"components": {"activity": 98, "longevity": 40, "rhythm": 98}, "computed_at": "2026-09-03T02:20:16.233290+00:00", "flags": [], "formula": "round(0.45*activity + 0.35*rhythm + 0.20*longevity); archived -> min(score, 10)", "inputs": {"age_days": 572, "days_push": 13, "days_rel": 15, "gap_med": 0, "n_releases_24m": 44}, "score": 86, "version": 2}, "staleness": {"enrichment_outdated": false, "low_confidence": false, "scrape_days": 9, "stale_scrape": false}}