NVIDIA deploys GPT-5.5-powered Codex to 10,000 employees, with engineers calling results 'mind-blowing'

NVIDIA has rolled out OpenAI's latest frontier model across its global workforce, with CEO Jensen Huang calling it a milestone in the "age of AI." Over 10,000 NVIDIA employees in engineering, product, legal, finance, and marketing were given early access to Codex, an agentic coding tool powered by GPT-5.5.

Engineers have been using the GPT-5.5-powered Codex for several weeks now, reporting big efficiency gains in software development and maintenance. "Debugging cycles that once stretched across days are closing in hours," says NVIDIA. Teams are also using natural-language prompts to deliver end-to-end features more reliably and with fewer wasted cycles than prior models.

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Huang encouraged employees to adopt Codex in an internal email, describing AI agents as teammates boosting productivity across all roles, not just engineering. "Chatbots answer questions. Agents do work," Huang wrote. "Let's jump to lightspeed. Welcome to the age of AI." Employees have echoed that sentiment, describing Codex as both "mind-blowing" and "life-changing."

As with anything agentic, security has been a central focus of the rollout. NVIDIA notes the deployment uses a zero-data-retention model with read-only integrations. AI agents interact via command-line tools and internal "Skills," providing extra control over what Codex can access or execute.

The system runs on an enterprise architecture where Codex agents operate in sandboxed cloud virtual machines. These agents can read company data but cannot directly modify or delete it. Each agent runs on a dedicated VM, with the Codex desktop app connecting to approved environments via Secure Shell (SSH).

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NVIDIA frames the GPT-5.5 deployment as the latest step in its long-running collaboration with OpenAI across hardware, software, and model deployment. The partnership, valued in the billions, has also led to the bring-up of the first GB200 NVL72 cluster, a 100,000-GPU system powering GPT-5.5 and other frontier models. NVIDIA claims these systems deliver up to 35x lower cost per million tokens and 50x higher token throughput per megawatt compared to previous generations.

OpenAI announced GPT-5.5 on Thursday, less than two months after releasing GPT-5.4. The company says its latest model improves on coding, computer use, and deeper research capabilities. GPT-5.5 is rolling out to OpenAI's paid subscribers, including Plus, Pro, Business, and Enterprise users, across ChatGPT and its coding assistant Codex.