Introducing GPT-5.5 A new class of intelligence for real work and...
OpenAI@OpenAI
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Apr 23, 2026
~1 min read
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Introducing GPT-5.5
A new class of intelligence for real work and powering agents, built to understand complex goals, use tools, check its work, and carry more tasks through to completion. It marks a new way of getting computer work done.
Now available in ChatGPT and Codex.
A new class of intelligence for real work and powering agents, built to understand complex goals, use tools, check its work, and carry more tasks through to completion. It marks a new way of getting computer work done.
Now available in ChatGPT and Codex.
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GPT-5.5 excels at writing and debugging code, researching online, analyzing data, creating documents and spreadsheets, operating software, and moving across tools until a task is finished.
The gains are especially clear in agentic coding, computer use, knowledge work, and early scientific research—areas where progress depends on reasoning across context and taking action over time. openai.com/index/introduc…
The gains are especially clear in agentic coding, computer use, knowledge work, and early scientific research—areas where progress depends on reasoning across context and taking action over time. openai.com/index/introduc…
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GPT-5.5 delivers this step up in intelligence without compromising on speed.
GPT-5.5 matches GPT-5.4 per-token latency in real-world serving, while performing better across nearly every evaluation we measured.
It also uses significantly fewer tokens to complete the same Codex tasks, making it more efficient as well as more capable.
GPT-5.5 matches GPT-5.4 per-token latency in real-world serving, while performing better across nearly every evaluation we measured.
It also uses significantly fewer tokens to complete the same Codex tasks, making it more efficient as well as more capable.
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In ChatGPT, full-stack inference improvements enable a more capable model at faster speed. This efficiency is a game-changer for GPT-5.5 Pro, now a much more practical option for demanding tasks, and a step change in the level of difficulty and quality of work ChatGPT can take on for people.
Early testers described it as an iterative “research partner,” performing especially well when paired with contextual inputs from documents and plugins.
Early testers described it as an iterative “research partner,” performing especially well when paired with contextual inputs from documents and plugins.
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GPT-5.5 is rolling out today for Plus, Pro, Business and Enterprise users across ChatGPT and Codex.
We’re also introducing GPT-5.5 Pro for Pro, Business, and Enterprise users in ChatGPT.
We’re also introducing GPT-5.5 Pro for Pro, Business, and Enterprise users in ChatGPT.
