Deprecation notice: Prompt Objects in the API will be shut down on November 30th, 2026

The playground-iteration loss is real, but there’s a pattern that keeps most of the speed: store prompts in your own DB/config with a tiny admin page (or even a Google Sheet your code reads), version them yourself, and A/B in production with the Responses API. You lose the playground UI but gain versioning + diffability, which dashboard Prompts never gave anyway.

The bigger reason to start now rather than at the deadline: anyone currently migrating off the Assistants API (dies Aug 26) following older guides is being pointed toward Prompt Objects — which now also die Nov 30. Worth flagging in any migration plan so people don’t pay for two migrations.