Braintrust engineers leverage OpenAI's Codex with GPT-5.5 to transform customer feature requests into functional preview branches within minutes. This AI coding tool has rapidly gained adoption, with half of the Braintrust team switching to Codex in just one month. For the observability platform, the shift represents more than just faster coding—it enables real-time customer collaboration.

The technology fundamentally changes how Braintrust approaches development. Instead of requests entering a backlog, engineers can copy customer ideas into Codex and create working demonstrations almost instantly. "Codex unlocked our ability to try out customer feature requests in real time," says CEO Ankur Goyal, highlighting how this accelerates the feedback loop between product development and customer needs.

Beyond speed, Codex enables autonomous problem-solving. Engineers can define problems in test environments and let Codex work through solutions without constant prompting. This efficiency lowers the cost of experimentation and allows Braintrust to explore more ideas. "The more code we write, the more customer problems we can solve," Goyal notes, emphasizing how Codex has become their most effective tool for addressing customer needs.