Use Writing and Code Blocks Instead of Successor Canvas UIs
Leverage inline blocks for document and code editing in GPT-5.5.
Transition from using the 'Canvas' UI to using native 'writing blocks' and 'code blocks' for document creation and coding tasks in the latest GPT-5.5 models.
The Scenario
You need to draft a long report or a software module and want a clean interface for editing, but you are using the updated GPT-5.5 Instant model.
Before & after
Users previously relied on the 'Canvas' interface for interactive editing, which required separate window management and took 5-10 minutes to refine.
Prompt the model to use 'writing blocks' or 'code blocks' for a clean, side-by-side style experience that takes only seconds to generate.
The Prompt
Write a detailed [ARTICLE_TOPIC/CODE_FUNCTION]. Please use a writing block for the main content so it is easy to read and edit. Avoid bullet-heavy responses.
OpenAI is moving away from the separate Canvas interface in newer models. Instead, users should rely on inline writing and code blocks which are now optimized for natural, everyday conversation and practical help.
Source
Model Release Notes | OpenAI Help Center"Writing and coding functionality is now supported directly in chat responses through writing blocks and code blocks."