How Braintrust turns customer requests into code with Codex
Braintrust built a code-generation workflow on Codex. Here's what shipping AI-assisted dev actually looks like.
Why it matters
Customer case study showing real-world deployment of OpenAI's Codex + GPT-5.5 for accelerating engineering velocity. Demonstrates practical app-layer use of frontier models beyond chat.
The key facts
9 to knowBraintrust using Codex with GPT-5.5
Use case: converting customer requests into code
Workflow optimization for experiments and code velocity
Published on OpenAI blog (official partnership/case study)
Braintrust integrated Codex with GPT-5.5 for experiment-driven development
Use case: converting customer requests directly into code
Efficiency gain: faster experimentation cycles (quantified impact not specified in excerpt)
Published May 29, 2026 on OpenAI blog
UNVERIFIED: GPT-5.5 version number not yet confirmed in public sources
Go to the source
OpenAI Blogopenai.com
Publisher excerpt: How Braintrust engineers use Codex with GPT-5.5 to run experiments and code faster.