References 488% CONFIDENCEOverall confidence: 88%How well the pin's source and references back up its dates.Weighted average of how firmly 4 references, the source included, support the pin's start and end times; a reference counts half as much for every 180 days older than the newestShow all pins at 75% confidence or better

The first entry is always the pin's source. Overall confidence is a weighted average of how firmly each reference supports the start and end times used above; a reference counts half as much for every 180 days older than the newest.

• [1]95%
  OpenAI Model Release Notes: GPT-5

  help.openai.com· Posted Sep 19, 2026· Starts Aug 7, 2025· 25% of score

  Dated from the release notes leave the GPT-5 entry undated; OpenAI^[3][4] launched GPT-5 in ChatGPT on Aug 7, 2025

• [2]78%
  GPT-5 - Wikipedia

  en.wikipedia.org· Added Sep 22, 2026· 25% of score

  Wikipedia's GPT-5 article says it "was launched on August 7, 2025" and is available in ChatGPT and Microsoft Copilot and to developers through the OpenAI^[1][3][4] API.

• [3]90%
  GPT-5 Model | OpenAI API

  developers.openai.com· Added Sep 22, 2026· 25% of score

  OpenAI's^[1][4] API model page for GPT-5 gives a "400,000 context window", "128,000 max output tokens", a Sep 30, 2024 knowledge cutoff, text and image input, and $1.25/$10 per million token pricing.

• [4]90%
  Introducing GPT-5

  openai.com· Added Sep 19, 2026· Starts Aug 7, 2025· 25% of score

  OpenAI's^[1][3] launch post for GPT-5, published Aug 7, 2025.

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