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.
OpenAI's[2][3] own model release notes date this entry March 18, 2026
OpenAI's[1][3] API model page for GPT-5.4 mini lists a 400,000 context window, 128,000 max output tokens and an Aug 31, 2025 knowledge cutoff.
OpenAI's[1][2] announcement post, linked from the release note entry.
Archived copy of OpenAI's[1][2][3] GPT-5.4 mini and nano launch post, with the benchmark table (Terminal-Bench 2.0 60.0% vs GPT-5 mini 38.2%, GPQA Diamond 88.0% vs 81.6%) and "supports text and image inputs, tool use, function calling, web search, file search, computer use, and skills".
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. A picture that shows something else, or shows it badly, is looked at too, and moved down or replaced.
