Chatham Financial cuts trade review from 30 to under 4 minutes with OpenAI Codex

OpenAI published a case study on Chatham Financial, which uses Codex and GPT-5.6 across its advisory workflows. A trade validation app built with Codex reduced review time from about 30 minutes to under four.

• Trade validation time fell from ~30 minutes to under 4 minutes
• Employee-built apps run on GPT-5.6 Terra and Sol by default
• The Onyx platform uses GPT-5.6, GPT-5.4 and GPT-4.1
• Codex is used across the Onyx development lifecycle