Codex's 50% adoption at Braintrust proves speed is the killer feature for AI coding agents
braintrust adopted openai's codex with gpt‑5.5 to generate code for feature requests, reducing iteration time from weeks to minutes and increasing developer capacity for autonomous problem-solving.
braintrust deployed openai's codex with gpt‑5.5 to transform customer feature requests into deployable code within minutes, prompting half its engineering team to migrate to the tool in just one month. ceo ankur goyal emphasizes that codex’s superior output velocity enables a novel workflow where engineers write tests and let the model run autonomously in sandboxed environments rather than relying on manual, step-by-step prompting. this capability eliminates the backlog bottleneck, allowing the team to ideate and ship features in real-time with customers rather than deferring development. the shift signals that high-speed inference is becoming a prerequisite for autonomous ai agents that require minimal human guidance.