OpenAI’s AI assistant: chat, data analysis, custom GPTs, deep research, ChatGPT Work and extensions for Excel and Google Sheets.
Free plan · paid from $8/month
| Plan | Published price |
|---|---|
| Free | $0/month |
| Go | $8/monthMay include ads. |
| Plus | $20/month |
| Pro | From $100/month (tiers at $100, $200 and $500) |
| Business | $25 per user per month billed monthly (2+ users)Annual billing is cheaper; we have not confirmed the annual figure. |
| Enterprise | Contact sales |
Figures read on OpenAI’s pricing page for ChatGPT and Codex, which share plans.
Prices verified on October 19, 2026 (chatgpt.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.
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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.
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.
In June 2026 Holded released a remote MCP server that lets AI assistants query and, if the user authorizes it, modify data in their account: invoices, contacts, treasury and stock. It connects with OAuth 2.1 and the assistant inherits the permissions of the Holded user who authorizes it.
FISCONSULTING, tax and accounting advisory firm in Madrid (project by Álvaro Díaz Blanco, UPM)Accounting or advisory firm · Tax and accounting advisory
A final-year thesis at UPM describes two automations built in n8n for FISCONSULTING, an advisory firm in Madrid: one that extracts and classifies invoices from Google Drive with ChatGPT, and another that handles appointments over WhatsApp. The author states that the time per invoice drops from 2 minutes to about 30 seconds.