According to official news, OpenAI has officially released GPT-5.5. This model represents a significant advancement in intelligent agent programming, computer use, and scientific research, achieving an accuracy of 82.7% in the Terminal-Bench 2.0 test. While maintaining the same latency as GPT-5.4, GPT-5.5 offers higher inference efficiency and consumes fewer tokens. Currently, GPT-5.5 is available to ChatGPT Plus, Pro, and enterprise users, and an API version will be launched soon. The pricing is $5 per 1 million input tokens and $30 per 1 million output tokens. In addition, GPT-5.5 Pro, designed for more challenging tasks, has also been released simultaneously.