Monday, Sep 7, 2026 The claims desk. Receipts included. POWERED BY LENZ
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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.

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.

The Receipts

  1. GPT-4 API general availability and deprecation of older models in the Completions API | OpenAI

    openai.com

  2. GPT-4 API general availability and deprecation of older models in the Completions API

    web.archive.org

  3. GPT-4 Model | OpenAI API

    developers.openai.com

  4. GPT-4 - OpenAI

    openai.com

  5. New models and developer products announced at DevDay

    openai.com

  6. GPT-4

    web.archive.org

  7. GPT-4 | OpenAI

    go.nature.com

  8. [2303.08774] GPT-4 Technical Report

    arxiv.org

  9. ChatGPT gets GPT-4 32K support for PDF and file chat with longer documents

    the-decoder.com

  10. [PDF] GPT-4 System Card | OpenAI

    cdn.openai.com

+ 9 more sources — see the full list on Lenz

Filed Under

GPT-4OpenAI

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