OpenAI has released GPT-5.5, their latest and most advanced model, integrated into Codex and ChatGPT Pro. This model represents a significant improvement over GPT-5.4, particularly in agentic coding, knowledge work, and early scientific research. GPT-5.5 offers a more intuitive personality, addressing previous criticisms of GPT-5.4’s rigid and soulless responses. It is designed to be more token-efficient, delivering higher intelligence with fewer tokens, which balances out its higher per-token cost, ultimately reducing overall expenses for users.
The model excels in enterprise environments, as demonstrated by benchmarks from Box AI, which show substantial accuracy improvements across various industries such as financial services, healthcare, public sector, and media. GPT-5.5’s integration with Box AI enables enterprises to extract meaningful insights from unstructured data while maintaining compliance and governance. The model also shows strong performance in terminal command-line interface tasks, outperforming competitors like Opus 4.7, and demonstrates enhanced capabilities in computer and browser control, although the latter is less relevant for some users.
GPT-5.5’s improvements extend to coding and project autonomy, with enhanced visual inspection and iterative testing capabilities. It can autonomously refine applications by visually inspecting outputs and making necessary adjustments without constant human intervention. This autonomy is showcased in demos such as a 3D hack-and-slash game and other interactive applications, highlighting the model’s ability to handle complex coding tasks and deliver polished results with better front-end design and logic.
Early testers report that GPT-5.5 has a stronger understanding of system architecture and debugging, showing an almost intuitive grasp of production environments and codebase impacts. It also excels in generating comprehensive documents, spreadsheets, and presentations, supporting real-world knowledge work effectively. The model’s higher ceiling of intelligence makes it suitable for frontier scientific research and complex problem-solving, while its token efficiency benefits everyday users by providing faster, more concise, and cost-effective outputs.
Despite its higher price point—double that of GPT-5.4—GPT-5.5’s token efficiency and improved performance make it a valuable upgrade. It is currently available to Plus, Pro, Business, and Enterprise users in ChatGPT and Codex, with API access expected soon. The model’s development involved co-designing with advanced hardware systems to optimize inference speed and intelligence delivery, embodying the self-improving AI cycle that leverages coding data to continuously enhance future models. Overall, GPT-5.5 sets a new standard for AI-driven coding and knowledge work.
