OpenAI’s coding agent, in the desktop app, the terminal, the editor and the cloud. OpenAI’s own product-finance team uses it for its monthly compute-cost close.
Limited free use · paid from $8/month
| Plan | Published price |
|---|---|
| Free | $0/month (limited use) |
| Go | $8/month |
| Plus | $20/monthCodex on the web, CLI, IDE extension and iOS. |
| Pro | $100, $200 or $500/month |
| Business | $25 per user per month billed monthly |
| API key | Pay per use at API rates |
Codex is included in ChatGPT plans and shares usage with ChatGPT Work.
Prices verified on October 19, 2026 (developers.openai.com). Prices and plans change often and may exclude tax. Check the official pricing page before you buy. We do not earn a commission from any of these tools.
3 entries
Instructions ready to adapt for an AI assistant that reconciles an account against the trial balance: it uses only the files provided, posts no entries, checks for duplicates, separates what ties out from what is doubtful and leaves a list of questions. It is our own wording based on practices published by accountants, not tested with real data.
Philip Eriksson (co-founder of Igdrasil)Individual · Swedish limited companies in software, e-commerce, digital health, services and food
Philip Eriksson, co-founder of Igdrasil, explains how, from mid-July 2026, he kept the books of several Swedish limited companies by talking to Claude Code and Codex. He provides volumes taken from his logs, a VAT error caught before filing and a table of agent failures. He is the author of an accounting tool.
OpenAI (product finance led by Kyle Kober; finance function under CFO Sarah Friar)Company · Artificial intelligence / software
OpenAI product-finance director Kyle Kober told CFO Dive his team used Codex to automate reconciling product-usage data with accounting records for compute capacity costs, cutting that monthly-close analysis from about five days to about five hours. Part of CFO Sarah Friar’s AI-native finance push; figures are company-stated and OpenAI sells the tools.