OpenAI announces InstructGPT and makes it the API's default model
Announced InstructGPT and switched the API's default model to it
Why it matters
OpenAI itself wrote that it unlocked capabilities that had been hard to draw out through prompt engineering alone
Source — Primary sources first; secondary reports are labelled “Press”
Officialopenai.comhttps://openai.com/index/instruction-following/Added in Week 35, 2026 · See that week