CONFIRMEDDate confidence: CONFIRMEDStated as firmHow firmly the source words the date: confirmed, scheduled, estimated, delayed or unverified.Show all CONFIRMED pins81% CONFIDENCEOverall confidence: 81%How well the pin's source and references back up its dates.Weighted average of how firmly 8 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
OpenAI's[1][3][4][5] post is dated March 17, 2026 and opens "Today we're releasing GPT-5.4 mini and nano"; the API changelog lists "March 17, 2026: Released GPT-5.4 mini and GPT-5.4 nano", the snapshots are gpt-5.4-mini-2026-03-17 and gpt-5.4-nano-2026-03-17, and The Decoder[7] and Decrypt[8] both published on 17 March. The ChatGPT rollout of mini on 18 March is the separate pin 1827.OpenAI releases GPT-5.4 mini and GPT-5.4 nano, its most capable small models yet: mini approaches GPT-5.4 on SWE-Bench Pro (54.4% against 57.7%) at more than 2x the speed of GPT-5 mini, and nano is API-only at $0.20 per 1 million input tokens.
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