OpenAI ChatGPT Update Version GPT-5.5 Instant

May 28, 2026 GPT-5.5 Instant Update improves response style and quality in ChatGPT and the API. It also removes canvas from GPT-5.5 Instant and GPT-5.5 Thinking, shifting writing and coding to in-chat writing blocks and code blocks.

• Responses are now more natural, easier to read, and better paced for practical help tasks.
• Writing and coding are now supported directly in chat responses through writing blocks and code blocks.

• Canvas is no longer available in GPT-5.5 Instant or GPT-5.5 Thinking.
• Paid users can continue using canvas for a limited time through legacy models until those models are sunset.

Product Information

Vendor: OpenAI

Product: ChatGPT

Version: GPT-5.5 Instant

Release date: May 28, 2026