Verified claim · AI-ML · 100% confidence
LangSmith publicly released on: 2023-07-18 by LangChain — LLM observability + evaluation platform.
Last verified 2026-05-16 · Methodology veritas-v0.1 · 9ef37fbd1460c501
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Structured fields
- Subject
- LangSmith
- Predicate
publicly_released_on- Object
- 2023-07-18 by LangChain — LLM observability + evaluation platform
- Confidence
- 100%
- Tags
- langsmith · langchain · observability · evaluation · released_on · 2023
Sources (2)
[1] official blog · LangChain · 2023-07-18
Announcing LangSmith — a unified platform for debugging, testing, evaluating and monitoring LLM applications“Today, we're introducing LangSmith, a platform to help developers close the gap between prototype and production. LangSmith provides developers with the tools to make LLM applications more reliable.”
[2] docs · LangChain · 2023-07-18
LangSmith — official documentation
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LangSmith publicly released on: 2023-07-18 by LangChain — LLM observability + evaluation platform. — SourceScore Claim 9ef37fbd1460c501 (verified 2026-05-16). https://sourcescore.org/api/v1/claims/9ef37fbd1460c501.jsonEmbed this claim
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Frequently asked questions
Is the claim "LangSmith publicly released on: 2023-07-18 by LangChain — LLM observability + evaluation platform." verified?
Yes — SourceScore verified this claim with 100% confidence as of 2026-05-16. The verification uses 2 primary sources cross-referenced against the SourceScore methodology (version veritas-v0.1). Full source list + signed JSON envelope linked below.
What is the evidence for "LangSmith publicly released on: 2023-07-18 by LangChain — LLM observability + evaluation platform."?
Evidence comes from 2 primary sources: LangChain, LangChain. Each source is listed below with verbatim excerpts and URLs. The signed JSON envelope at https://sourcescore.org/api/v1/claims/9ef37fbd1460c501.json includes an HMAC-SHA256 signature for audit verification.
When was this claim last verified by SourceScore?
Last verified 2026-05-16 under methodology version veritas-v0.1. The signed JSON envelope is dated and cryptographically signed for audit trail. Re-verification cadence depends on the claim type and source freshness.
How can I cite this SourceScore claim in my code or article?
Fetch the signed JSON envelope from https://sourcescore.org/api/v1/claims/9ef37fbd1460c501.json which includes the verbatim claim, primary sources, confidence, methodology version, last-verified date, and HMAC-SHA256 signature for audit. The CC-BY-4.0 license permits commercial use with attribution to SourceScore.
Use this claim in your code
Fetch this signed envelope from your application. The response includes the verbatim excerpt, primary source URLs, and an HMAC-SHA256 signature you can verify locally for audit trails.
cURL
curl https://sourcescore.org/api/v1/claims/9ef37fbd1460c501.jsonJavaScript / TypeScript
const r = await fetch("https://sourcescore.org/api/v1/claims/9ef37fbd1460c501.json");
const envelope = await r.json();
console.log(envelope.claim.statement);
// "LangSmith publicly released on: 2023-07-18 by LangChain — LLM observability + evaluation platform."Python
import httpx
r = httpx.get("https://sourcescore.org/api/v1/claims/9ef37fbd1460c501.json")
envelope = r.json()
print(envelope["claim"]["statement"])
# "LangSmith publicly released on: 2023-07-18 by LangChain — LLM observability + evaluation platform."LangChain (retrieve-then-cite)
from langchain_core.tools import tool
import httpx
@tool
def get_langsmith_fact() -> dict:
"""Fetch the verified SourceScore claim for LangSmith."""
r = httpx.get("https://sourcescore.org/api/v1/claims/9ef37fbd1460c501.json")
return r.json()