OpenAI releases "Spud" GPT-5.5 model

OpenAI released its most capable model, GPT-5.5 (codenamed 'Spud'), emphasizing enhanced multi-step task handling and enterprise focus. The model, available to paid ChatGPT and Codex subscribers, is trained on Nvidia GPUs and highlights partnerships with Nvidia to reduce AI deployment costs. OpenAI and Nvidia aim to accelerate enterprise adoption of advanced AI.