OpenAI kills o3 and GPT-4.5
openai is retiring the o3 and gpt-4.5 models while making gpt-5.5 instant responses more natural and removing the canvas feature.
openai announced the deprecation of o3 and gpt-4.5, with final removal dates set for august 26, 2026, and june 27, 2026, respectively, while simultaneously updating gpt-5.5 instant for improved readability and structure. the update also removes the canvas interface from gpt-5.5 instant and thinking models, replacing the side panel with in-line chat blocks for writing and coding. paying users retain access to older features during the transition, and o3 remains available in the api for now. these moves signal a rapid shift in openai's product strategy, retiring legacy reasoning models to consolidate resources around the gpt-5.5 family.