OpenAI published a case study detailing how Wasmer, a company focused on WebAssembly tooling, used Codex with GPT-5.5 to build a Node.js runtime for edge computing. According to the study, the project shipped in weeks rather than the months it would typically require.
The case study reports that AI assistance accelerated development by 10x to 20x. This is notable because building a runtime for the edge involves low-level systems programming and careful compatibility work, not just routine code generation.
While the results are striking, the source is a single vendor case study from OpenAI, so it does not include independent benchmarks or a detailed comparison against a non-AI baseline. Still, it offers a concrete example of AI tools being applied to substantial infrastructure projects.