OpenAI has launched a new AI model called GPT-5.3 Codex, along with a new enterprise platform named Frontier. GPT-5.3 Codex is designed to boost Codex, OpenAI’s agentic coding tool marketed for software developers. Meanwhile, Frontier aims to help enterprises build, deploy and manage AI agents.
Earlier versions of Codex mainly focused on helping developers write and review code. With the new GPT-5.3 Codex model, OpenAI says Codex can now do much more. According to the company, the model turns Codex into an agent that can do ‘nearly anything developers and professionals do on a computer, expanding who can build software and how work gets done.’
OpenAI says GPT-5.3 Codex performs better on several benchmarks and is 25 percent faster than the previous version. The company also claims the model can create ‘highly functional complex games and apps from scratch over the course of days.’
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One notable detail about GPT-5.3 Codex is how it was built. OpenAI says it is the first model that ‘was instrumental in creating itself.’ Early versions of the model were used by OpenAI staff to debug the system and check how well it was working.
Alongside GPT-5.3 Codex, OpenAI unveiled Frontier, a platform made for businesses that want to use AI agents at scale. Frontier helps companies build, manage, and control AI agents, including ones created outside OpenAI.
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OpenAI says Frontier works like managing employees, with onboarding and feedback systems to help agents improve over time. Companies like HP, Oracle, State Farm, and Uber are already using it, though Frontier is currently limited to select users and will roll out more widely in the coming months.
For AI users, these launches hint at a future where AI agents play a bigger role in everyday work, from coding to enterprise operations.
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