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

OpenAI is updating GPT-5.5 Instant for more natural responses and dropping the Canvas feature from its latest models. Writing and coding tasks will run directly in the chat instead. The company is also retiring the older o3 and GPT-4.5 models from ChatGPT, with both shutting down by August 2026 at the latest. The article OpenAI gives GPT-5.5 Instant a readability upgrade while phasing out two older models appeared first on The Decoder .