Ramp Engineers Use Codex (GPT-5.5) to Cut Code Review From Hours to Minutes

The fintech company is reportedly running AI-powered code review with OpenAI's Codex, shifting the conversation from AI-generated code to AI-reviewed code — a potentially more impactful workflow change.

Most of the discourse around AI coding tools focuses on generation: agents writing code from scratch. But a case study from fintech company Ramp, highlighted by @fujikou25, suggests the bigger productivity unlock may be on the review side. Engineers at Ramp are reportedly using Codex, powered by GPT-5.5, to conduct code reviews — compressing what previously took hours into minutes.

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