Verified claim · AI-ML · 100% confidence
Claude 3 Opus context window tokens: 200000.
Last verified 2026-05-16 · Methodology veritas-v0.1 · 565df27fc8b75ef0
Structured fields
- Subject
- Claude 3 Opus
- Predicate
context_window_tokens- Object
- 200000
- Confidence
- 100%
- Tags
- claude-3 · opus · anthropic · context · 200k
Sources (2)
[1] official blog · Anthropic · 2024-03-04
Introducing the next generation of Claude“All Claude 3 models … offer a 200K context window at launch.”
[2] docs · Anthropic
Claude models — context length reference
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Claude 3 Opus context window tokens: 200000. — SourceScore Claim 565df27fc8b75ef0 (verified 2026-05-16). https://sourcescore.org/api/v1/claims/565df27fc8b75ef0.jsonEmbed this claim
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Anthropic founded in: 2021.
dc53356a0a39c8de · 100% confidence · shares 1 tag (anthropic)
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/565df27fc8b75ef0.jsonJavaScript / TypeScript
const r = await fetch("https://sourcescore.org/api/v1/claims/565df27fc8b75ef0.json");
const envelope = await r.json();
console.log(envelope.claim.statement);
// "Claude 3 Opus context window tokens: 200000."Python
import httpx
r = httpx.get("https://sourcescore.org/api/v1/claims/565df27fc8b75ef0.json")
envelope = r.json()
print(envelope["claim"]["statement"])
# "Claude 3 Opus context window tokens: 200000."LangChain (retrieve-then-cite)
from langchain_core.tools import tool
import httpx
@tool
def get_claude_3_opus_fact() -> dict:
"""Fetch the verified SourceScore claim for Claude 3 Opus."""
r = httpx.get("https://sourcescore.org/api/v1/claims/565df27fc8b75ef0.json")
return r.json()