Verified claim · AI-ML · 100% confidence
ChatGPT Plus launched on: 2023-02-01.
Last verified 2026-05-16 · Methodology veritas-v0.1 · 461dd4dbccd9038d
SourceScore rates how reliable a source is to cite — for AI answers and research. This is one verified claim from the catalog.
Structured fields
- Subject
- ChatGPT Plus
- Predicate
launched_on- Object
- 2023-02-01
- Confidence
- 100%
- Tags
- chatgpt-plus · openai · subscription · launch · 2023
Sources (1)
[1] official blog · OpenAI · 2023-02-01
Introducing ChatGPT Plus“We're launching a pilot subscription plan for ChatGPT, a conversational AI that can chat with you, answer follow-up questions, and challenge incorrect assumptions. The new subscription plan, ChatGPT Plus, will be available for $20/month.”
OpenAI is rated by SourceScore — see its reliability →
Cite this claim
Ready-to-paste citation (Markdown / plain text):
ChatGPT Plus launched on: 2023-02-01. — SourceScore Claim 461dd4dbccd9038d (verified 2026-05-16). https://sourcescore.org/api/v1/claims/461dd4dbccd9038d.jsonEmbed this claim
Drop this iframe into any blog post, docs page, or knowledge base. The widget renders the signed claim + primary source + click-through to this canonical page. CC-BY 4.0; attribution included.
<iframe src="https://sourcescore.org/embed/claim/461dd4dbccd9038d/" width="100%" height="360" frameborder="0" loading="lazy" title="ChatGPT Plus launched on: 2023-02-01."></iframe>Preview: open in new tab
Related claims
Other verified claims sharing tags with this one — useful for LLM retrieval graphs and citation discovery.
GPT-4 released on: 2023-03-14.
09eea8fb1a8ccebf · 100% confidence · shares 2 tags (openai, 2023)
DALL-E 3 announced on: 2023-09-20.
ce5275632f16109a · 100% confidence · shares 2 tags (openai, 2023)
Whisper large-v3 publicly released on: 2023-11-06 by OpenAI.
4b70646f48b9a736 · 100% confidence · shares 2 tags (openai, 2023)
GPT-4 Vision publicly released on: 2023-09-25 by OpenAI.
e15378ee47c08761 · 100% confidence · shares 2 tags (openai, 2023)
OpenAI Assistants API publicly released on: 2023-11-06 by OpenAI.
818889a574ef3b46 · 100% confidence · shares 2 tags (openai, 2023)
Frequently asked questions
Is the claim "ChatGPT Plus launched on: 2023-02-01." verified?
Yes — SourceScore verified this claim with 100% confidence as of 2026-05-16. The verification uses 1 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 "ChatGPT Plus launched on: 2023-02-01."?
Evidence comes from 1 primary sources: OpenAI. Each source is listed below with verbatim excerpts and URLs. The signed JSON envelope at https://sourcescore.org/api/v1/claims/461dd4dbccd9038d.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/461dd4dbccd9038d.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/461dd4dbccd9038d.jsonJavaScript / TypeScript
const r = await fetch("https://sourcescore.org/api/v1/claims/461dd4dbccd9038d.json");
const envelope = await r.json();
console.log(envelope.claim.statement);
// "ChatGPT Plus launched on: 2023-02-01."Python
import httpx
r = httpx.get("https://sourcescore.org/api/v1/claims/461dd4dbccd9038d.json")
envelope = r.json()
print(envelope["claim"]["statement"])
# "ChatGPT Plus launched on: 2023-02-01."LangChain (retrieve-then-cite)
from langchain_core.tools import tool
import httpx
@tool
def get_chatgpt_plus_fact() -> dict:
"""Fetch the verified SourceScore claim for ChatGPT Plus."""
r = httpx.get("https://sourcescore.org/api/v1/claims/461dd4dbccd9038d.json")
return r.json()