GPT 5.5 Arrives: A Leap in AI Coding and Knowledge Work

Summary

OpenAI has launched GPT 5.5, its newest frontier model, available in Codex and ChatGPT Pro. Early testing indicates significant improvements, especially in agentic coding, computer use, knowledge work, and scientific research. GPT 5.5 addresses previous criticisms by offering a more intuitive and concise user experience, fixing issues like overly verbose explanations. A key advancement is its token efficiency, meaning it uses fewer tokens to achieve a higher level of intelligence, potentially leading to lower overall costs despite a higher per-token price. Benchmarks show GPT 5.5 outperforming its predecessor, GPT 5.4, and competitor models like Claude 4.7 across various tasks, including terminal operation, computer control, and web browsing. The model also demonstrates a stronger ability to understand complex system logic and predict potential code failures. GPT 5.5 is rolling out to various subscription tiers, with API access expected soon. This release signifies a strategic focus on enterprise coding, driven by a self-improving AI flywheel that leverages coding data to enhance future models.