Adopt Native Writing and Code Blocks for Seamless In-Chat Editing
Use native blocks for coding and writing instead of canvas.
Transition from the old canvas feature to native writing and code blocks for a faster, more integrated editing experience in GPT-5.5.
The Scenario
You need to draft a technical report or write code and want to edit specific sections within the chat interface without using legacy tools.
Before & after
Users previously relied on the 'canvas' interface to edit long-form content, which often required 15–20 minutes of setup and context switching.
By working within the new native blocks, you can edit code and text in 5–10 minutes without switching interface modes.
The Prompt
Generate a Python script to [INSERT GOAL] and provide it in a code block. Then, write a summary in a writing block.
OpenAI is retiring the 'canvas' interface for newer models (GPT-5.5 Instant) in favor of integrated writing and code blocks. This streamlines the chat experience into a single flow.
Source
Model Release Notes | OpenAI Help Center"Writing and coding functionality is now supported directly in chat responses through writing blocks and code blocks."