OpenAI upgrades GPT-5.5 Instant, phases out older GPT models
TL;DR. OpenAI is updating its GPT-5.5 Instant AI model for enhanced readability and removing its Canvas feature. - GPT-5.5 Instant will now process writing and coding tasks directly within the chat interface. - OpenAI plans to retire the older o3 and GPT-4.5 models by August 2026, removing them from ChatGPT. - Paid users retain temporary access to Canvas via older models and can still use o3 in the API.
- OpenAI improves GPT-5.5 Instant's response naturalness and readability, reducing bullet points.
- The Canvas feature for code and text editing is being removed from GPT-5.5 Instant and GPT-5.5 Thinking, integrating these functions directly into chat.
- Older models, o3 and GPT-4.5, will be phased out from ChatGPT by August 2026, with sun-setting periods announced.