GPT-5. 3-Codex is a Codex-native agent that pairs frontier coding performance with general reasoning to support long-horizon, real-world technical work.
How engineers at Nextdoor use Codex with GPT-5. 5 to investigate hard-to-reproduce issues, build across platforms, and focus on product outcomes.
Teams use Codex with GPT-5. 5 to ship production systems and turn research ideas into runnable experiments.
Introducing GPT-5. 1-Codex-Max, a faster, more intelligent agentic coding model for Codex.
How Braintrust engineers use Codex with GPT-5. 5 to run experiments and code faster.
Proaction leverages Codex, GPT‑Live‑1, and GPT‑6 Astra to accelerate the development, operation, and sales of modern fleet management solutions, achieving a 60% increase in sales and saving over 75 hours of work.