Verified claim · AI-ML · 100% confidence
GPT-4 Turbo context window tokens: 128000.
Last verified 2026-05-16 · Methodology veritas-v0.1 · 26314e3164e18b24
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Structured fields
- Subject
- GPT-4 Turbo
- Predicate
context_window_tokens- Object
- 128000
- Confidence
- 100%
- Tags
- gpt-4-turbo · context · openai · 128k · devday
Sources (2)
[1] official blog · OpenAI · 2023-11-06
New models and developer products announced at DevDay“GPT-4 Turbo … supports up to 128K tokens of context — equivalent to more than 300 pages of text in a single prompt.”
OpenAI is rated by SourceScore — see its reliability →[2] docs · OpenAI
OpenAI GPT-4 Turbo model documentationOpenAI is rated by SourceScore — see its reliability →
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GPT-4 Turbo context window tokens: 128000. — SourceScore Claim 26314e3164e18b24 (verified 2026-05-16). https://sourcescore.org/api/v1/claims/26314e3164e18b24.jsonEmbed this claim
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Frequently asked questions
Is the claim "GPT-4 Turbo context window tokens: 128000." 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 "GPT-4 Turbo context window tokens: 128000."?
Evidence comes from 2 primary sources: OpenAI, OpenAI. Each source is listed below with verbatim excerpts and URLs. The signed JSON envelope at https://sourcescore.org/api/v1/claims/26314e3164e18b24.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/26314e3164e18b24.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/26314e3164e18b24.jsonJavaScript / TypeScript
const r = await fetch("https://sourcescore.org/api/v1/claims/26314e3164e18b24.json");
const envelope = await r.json();
console.log(envelope.claim.statement);
// "GPT-4 Turbo context window tokens: 128000."Python
import httpx
r = httpx.get("https://sourcescore.org/api/v1/claims/26314e3164e18b24.json")
envelope = r.json()
print(envelope["claim"]["statement"])
# "GPT-4 Turbo context window tokens: 128000."LangChain (retrieve-then-cite)
from langchain_core.tools import tool
import httpx
@tool
def get_gpt_4_turbo_fact() -> dict:
"""Fetch the verified SourceScore claim for GPT-4 Turbo."""
r = httpx.get("https://sourcescore.org/api/v1/claims/26314e3164e18b24.json")
return r.json()