OpenAI has begun rolling out GPT-5.5 to paid users across ChatGPT and Codex, less than two months after the company introduced GPT-5.4.

What changed

In its launch post, OpenAI described GPT-5.5 as its most capable model yet for agentic coding, computer use, knowledge work, and early scientific research. The company said the new model is better at handling messy, multi-step tasks with less step-by-step guidance, while matching GPT-5.4 on per-token latency in production and using fewer tokens on Codex tasks.

OpenAI said GPT-5.5 is rolling out immediately to Plus, Pro, Business, and Enterprise users in ChatGPT and Codex. A higher-tier GPT-5.5 Pro version is going to Pro, Business, and Enterprise plans. API access is not live yet; OpenAI said it is still working through the extra safety and security requirements needed for broader deployment.

Why it matters

The release sharpens OpenAI's push to make ChatGPT and Codex less like single-turn assistants and more like systems that can carry work across tools and longer workflows. CNBC, citing remarks from OpenAI president Greg Brockman, reported that the company sees GPT-5.5 as a step toward more capable day-to-day computer work.

The conservative takeaway is that GPT-5.5 is not a new product category on its own. But it is a meaningful model update for developers and office users who already rely on ChatGPT or Codex and want stronger coding, tool use, and research performance without waiting for API availability.