OpenAI gives GPT-5.5 Instant a readability upgrade while phasing out two older models

OpenAI has announced an update to its GPT-5.5 Instant model, enhancing its responses for more natural interactions while discontinuing the Canvas feature in new models. The company will also retire the older o3 and GPT-4.5 models from ChatGPT, with both set to shut down by August 2026 at the latest. This update aims to improve user experience in writing and coding tasks. This shift demonstrates OpenAI's commitment to delivering more efficient models, potentially impacting how AI is utilized in business and daily applications.