GPT-5.5 Instant

GPT-5.5 Instant is presented as the most intelligent and user-friendly model to date, designed to streamline workflows on computers. It demonstrates a stronger ability to understand user intent and autonomously handle complex, multi-step tasks—such as coding, online research, data analysis, document creation, software operation, and tool navigation—even when instructions are vague or multi-part. The model shows significant improvements in agentic coding, computer use, knowledge work, and early scientific research, where reasoning across context and sustained action are critical. Notably, GPT-5.5 achieves this higher level of intelligence without sacrificing speed, matching the per-token latency of GPT-5.4 while being more efficient, using fewer tokens for the same tasks. It also incorporates robust safeguards, developed through extensive safety evaluations, red teaming, and feedback from early-access partners, to mitigate misuse while supporting beneficial applications.