# OpenAI — Chatham scales its capital markets expertise with OpenAI

- Company: OpenAI (openai.com)
- Announced: 2026-10-02
- Category: not stated
- Coverage: not counted
- Announcement: no
- Group: routine
- Source: https://openai.com/index/chatham-financial
- Record: https://forck.live/items/15774-chatham-scales-its-capital-markets-expertise-with-openai
- Subject: GPT / ChatGPT / API
- Models affected: Codex, GPT-5.6, GPT-5.6 Terra, GPT-5.6 Sol, GPT-5.4, GPT-4.1

Chatham Financial uses OpenAI's Codex and GPT-5.6 to build internal and client-facing tools, including a trade validation application that reduced review time from approximately 30 minutes to under 4 minutes. The firm also uses these models in its capital markets operating system Chatham Onyx and its reengineering consulting service Process Zero. Employees build custom applications via the internal platform Chatham Vibes, which defaults to GPT-5.6 Terra with an optional GPT-5.6 Sol upgrade.

## Evidence

Verbatim from https://openai.com/index/chatham-financial:

> Using Codex, Chatham developed a trade validation application that gathers supporting transaction evidence, compares key terms, and flags discrepancies for review. Chatham is comparing the app's results with those of experienced reviewers.

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Record: https://forck.live/items/15774-chatham-scales-its-capital-markets-expertise-with-openai
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