OpenAI released GPT-5.5 on April 23, 2026, positioning it as its "smartest and most intuitive" model to date. The announcement comes just six weeks after GPT-5.4, underscoring the intensifying pace of frontier AI development. GPT-5.5 is available across ChatGPT Plus, Pro, Business, and Enterprise tiers, with a dedicated Pro variant for power users.
President Greg Brockman characterized the model as capable of "doing much more with less guidance," emphasizing its ability to parse ambiguous instructions and autonomously determine next steps. OpenAI reports material improvements in coding accuracy, mathematical reasoning, multi-step task coordination, and computer use. On Terminal-Bench 2.0, GPT-5.5 scored 82.7% , substantially ahead of Claude Opus 4.7 at 69.4% and Gemini 3.1 Pro at 68.5%. Notably, the model matches GPT-5.4 on per-token latency while delivering superior reasoning, suggesting architectural efficiency gains rather than brute compute scaling.
The release aligns with OpenAI's broader strategy of building an AI super app integrating ChatGPT, Codex, and browser automation. Pricing is set at 2x GPT-5.4 rates, reflecting the expanded agentic and enterprise capability envelope. For organizations deploying AI at scale, the model's reduced need for prompt engineering represents a meaningful reduction in implementation friction.