Verified claim · AI-ML · 100% confidence
LMArena (Chatbot Arena) founded in: 2023 — LMSYS Chatbot Arena → LMArena.ai 2024.
Last verified 2026-05-16 · Methodology veritas-v0.1 · 88ff5918737d7b6b
Structured fields
- Subject
- LMArena (Chatbot Arena)
- Predicate
founded_in- Object
- 2023 — LMSYS Chatbot Arena → LMArena.ai 2024
- Confidence
- 100%
- Tags
- lmarena · chatbot-arena · lmsys · evaluation · elo-rating · benchmark · founded · 2023
Sources (2)
[1] official blog · LMSYS Org (UC Berkeley) · 2023-05-03
Chatbot Arena: An LLM Benchmark Platform“Today, we are launching Chatbot Arena, a benchmark platform for LLMs that features anonymous, randomized battles in a crowdsourced manner. The Arena uses Elo rating system, which is a method for calculating the relative skill levels of players.”
[2] official blog · LMSYS Org / LMArena Inc. · 2024-03-01
LMArena — official site
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LMArena (Chatbot Arena) founded in: 2023 — LMSYS Chatbot Arena → LMArena.ai 2024. — SourceScore Claim 88ff5918737d7b6b (verified 2026-05-16). https://sourcescore.org/api/v1/claims/88ff5918737d7b6b.jsonEmbed this claim
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Frequently asked questions
Is the claim "LMArena (Chatbot Arena) founded in: 2023 — LMSYS Chatbot Arena → LMArena.ai 2024." 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 "LMArena (Chatbot Arena) founded in: 2023 — LMSYS Chatbot Arena → LMArena.ai 2024."?
Evidence comes from 2 primary sources: LMSYS Org (UC Berkeley), LMSYS Org / LMArena Inc.. Each source is listed below with verbatim excerpts and URLs. The signed JSON envelope at https://sourcescore.org/api/v1/claims/88ff5918737d7b6b.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/88ff5918737d7b6b.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.
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cURL
curl https://sourcescore.org/api/v1/claims/88ff5918737d7b6b.jsonJavaScript / TypeScript
const r = await fetch("https://sourcescore.org/api/v1/claims/88ff5918737d7b6b.json");
const envelope = await r.json();
console.log(envelope.claim.statement);
// "LMArena (Chatbot Arena) founded in: 2023 — LMSYS Chatbot Arena → LMArena.ai 2024."Python
import httpx
r = httpx.get("https://sourcescore.org/api/v1/claims/88ff5918737d7b6b.json")
envelope = r.json()
print(envelope["claim"]["statement"])
# "LMArena (Chatbot Arena) founded in: 2023 — LMSYS Chatbot Arena → LMArena.ai 2024."LangChain (retrieve-then-cite)
from langchain_core.tools import tool
import httpx
@tool
def get_lmarena_chatbot_arena_fact() -> dict:
"""Fetch the verified SourceScore claim for LMArena (Chatbot Arena)."""
r = httpx.get("https://sourcescore.org/api/v1/claims/88ff5918737d7b6b.json")
return r.json()