OpenAI shifts to enterprise plumbing

OpenAI’s latest ChatGPT updates are about who can use its tools, what those tools can touch, and how companies get billed for them. (help.openai.com, help.openai.com) On April 2, OpenAI updated its Codex rate card to charge by token use instead of by message for new and existing ChatGPT Plus, Pro, and Business customers, plus new Enterprise customers. The company said existing Enterprise customers and other plans will stay on a legacy card until migration in the coming weeks. (help.openai.com) The new table lists different credit costs per 1 million tokens by model, including 62.50 input credits and 375 output credits for GPT-5.4, and 43.75 input credits and 350 output credits for GPT-5.3-Codex. OpenAI said fast mode uses twice as many credits and estimated average Codex spending at about $100 to $200 per developer per month. (help.openai.com) A custom action is the part of a custom GPT that lets it call an outside application programming interface, or API, such as a company database or ticketing system. OpenAI’s GPT actions documentation says workspace restrictions, authentication rules, and schema controls now sit alongside those API connections as standard setup work. (help.openai.com, help.openai.com) That puts the emphasis on administration rather than a single flagship model. In the same April 2026 release cycle, OpenAI added controls for SCIM-managed group discoverability in Enterprise and Education sharing flows and told admins to review Microsoft permissions, role-based access control, and app action controls before enabling new Outlook actions. (help.openai.com) OpenAI also changed how teams buy access. As of April 2, ChatGPT Business and ChatGPT Enterprise can use two seat types: a standard ChatGPT seat and a Codex-only seat with no fixed monthly user fee, with usage drawn from workspace credits. (help.openai.com, help.openai.com) OpenAI said Codex-only seats have no rate limits and are billed on token consumption, while standard Business seats still include Codex with usage limits. The company also cut annual ChatGPT Business pricing from $25 to $20 per seat and said eligible Business workspaces can receive up to $500 in credits for adding Codex-only users. (openai.com) The backdrop is a product line in flux. OpenAI’s help articles say GPT-4o and GPT-4.1 were retired from ChatGPT on February 13, 2026, with API access unchanged, and GPT-4o in custom GPTs for Business, Enterprise, and Education fully retired after April 3, 2026. (help.openai.com, help.openai.com) So the latest story is less about a brand-new model than about the wiring around OpenAI’s workplace products: permissions, seat types, usage pools, and metered billing. Those are the pieces OpenAI updated across its help center and product pages in early April. (help.openai.com, help.openai.com, openai.com)