OpenAI has introduced GPT-5.4 mini and GPT-5.4 nano, two small, cost-efficient versions of its flagship AI model. In a press release, OpenAI said that 5.4 nano and mini are “our most capable small ...
OpenAI says it's rolling out a new update that improves the existing GPT-5.5 Instant model and retires multiple legacy models, including o3. GPT-5.5 Instant was released on April 23, and it has made ...