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.
Dated from the release notes leave the GPT-5 entry undated; OpenAI[3][4] launched GPT-5 in ChatGPT on Aug 7, 2025
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.
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.
OpenAI's[1][3] launch post for GPT-5, published Aug 7, 2025.
Something missing or wrong? Say it in your own words: a link that backs this pin up, a different start or end date and why, or a fact it lacks or gets wrong. The AI checks it against this pin's sources, searches for better ones, and adds any page that backs you up. The pin's own sources still count most.
