GPT-4 launched with 8,192 tokens and a limited 32,768-token variant.
The Claim
GPT-4 had a context window of 128,000 tokens at its release in March 2023.
NOT BS
TOTAL BS
TOTAL BS — Verdict: False
Verified by Lenz · Sep 7, 2026
The Short Version
The March 2023 release did not provide a 128,000-token context window. OpenAI documented an 8,192-token window for GPT-4 and limited access to a 32,768-token variant; the 128K window was announced for GPT-4 Turbo in November 2023. The claim conflates the original model with that later release.
Caveats
The claim conflates the original GPT-4 with the later GPT-4 Turbo model.
The 128K context window was announced in November 2023, not March 2023.
General references to long-context research do not establish a 128K launch capacity.