GPT-4 launched with 8,192 tokens and a limited 32,768-token variant.

OpenAI's GPT-4, launched in March 2023, had an 8,192-token context window with limited access to a 32,768-token variant, not the 128,000-token window claimed. The 128K context window was introduced with GPT-4 Turbo in November 2023, according to a fact-check by Lenz on Sep 7, 2026.

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.