OpenAI — May 2026

Example data
03-16POST /v1/assistantsfile_ids param removed from Assistants createCritical
03-15Assistants API deprecated, replaced by Responses APIWarning
03-12GPT-4.1 model added to completionsInfo
03-10Responses API rate limits updatedWarning
03-06Function calling schema validation now strict by defaultCritical
03-02New /v1/embeddings batch endpointInfo
02-25Token counting utility added to SDKInfo
02-20Fine-tuning API supports GPT-4.1 baseInfo