OpenAI released GPT-5.5 to paid users of ChatGPT and the Codex platform. The model, internally codenamed Spud, represents the company's first fully retrained base model since GPT-4.5. GPT-5.5 improves performance in agentic coding, computer use, and scientific research. The system handles complex, multi-step tasks with minimal guidance while maintaining existing response times.
This launch supports OpenAI's strategy to build a unified superapp for desktop users. The software integrates chat, coding, and browsing tools into a single interface to streamline workflows. OpenAI aims to strengthen its market position against competitors Anthropic and Google. The model costs more per token but offers higher efficiency to reduce total task expenses.