OpenAI Codex hits 5 million users

OpenAI’s Codex has moved from an experimental coding tool into a metered product with visible usage ceilings, published rate cards and growing signs of enterprise-style cost control. By June 1, Codex had reached about 5 million users, according to reports citing the company’s recent usage disclosures, after OpenAI said on April 21 that weekly developer usage had crossed 4 million. OpenAI’s own documentation now puts pricing mechanics at the center of the product. A Help Center article updated within the past week says Codex pricing is now based on API-style token usage across Plus, Pro, Business, Enterprise, Edu, Health and Gov plans, replacing the earlier per-message system. The shift matters because Codex is no longer being sold only as a feature inside ChatGPT. OpenAI’s pricing page lists separate plan tiers, higher-rate Pro options, API-key usage for automation, and enterprise controls such as audit logs, role-based access control and data-retention settings. (officechai.com) ### Why did OpenAI reset limits as usage climbed? OpenAI reset Codex usage limits after rapid growth pushed more developers onto the product, according to reports tracking the company’s disclosures and user notices. (help.openai.com) OfficeChai reported on June 1 that Codex had reached 5 million users and said OpenAI had previously disclosed 1.6 million weekly active users in early March and more than 4 million weekly developers by April 21. (developers.openai.com) April 2 was the key pricing date in OpenAI’s own documentation. The Help Center says OpenAI switched new and existing Plus, Pro and Business users to token-based Codex pricing on April 2, then extended that update on April 23 to existing Enterprise plans, including Edu, Health, Gov and ChatGPT for Teachers. ### What does the new Codex rate card actually show? OpenAI’s rate card now breaks Codex usage into credits per million input, cached-input and output tokens. (officechai.com) The Help Center lists GPT-5.5 at 125 credits per million input tokens and 750 credits per million output tokens, with lower rates for other models including GPT-5.4, GPT-5.4-Mini and GPT-5.3-Codex. The same Help Center page says “Fast mode” consumes credits at a higher rate for supported models and adds that Codex usage limits are shared with other agentic features once pricing for those features takes effect. (help.openai.com) OpenAI also says average Codex spending runs about $100 to $200 per developer per month, while warning that costs vary widely by model, instance count, automations and fast-mode use. OpenAI’s developer pricing page also makes the tiering more explicit. (help.openai.com) Plus includes Codex on the web, CLI, IDE extension and iOS, while Pro offers either 5x or 20x higher rate limits than Plus, and Business and Enterprise add larger virtual machines, admin controls and compliance tooling. ### How expensive can heavy Codex use get? Dan Shipper, chief executive of Every, said he spent about $13,000 on personal Codex overage charges in a single month, according to Business Today, which cited a Business Insider interview. (help.openai.com) Shipper described it as the highest AI bill he had paid. Shipper said Every treats AI access as a standard operating expense. (developers.openai.com) Business Today reported that the company gives all employees AI subscriptions, provides higher-tier plans for technical staff, and covers overages when workers exceed usage limits. ### Where is OpenAI pushing Codex next? May 29 brought another signal that OpenAI is widening Codex’s scope beyond browser-based coding sessions. (businesstoday.in) OpenAI’s Enterprise and Edu release notes said Codex added Computer Use for Windows and remote control from ChatGPT on iOS or Android, while also adding support for customer-hosted GitHub Enterprise Server repositories. Those same release notes show OpenAI tying Codex into broader workplace tooling. (businesstoday.in) The company said Enterprise and Edu admins can now use app templates for GitHub Enterprise, Snowflake and Databricks, and can manage role access, action controls and publishing permissions for workspace agents. June pricing pages and Help Center updates now serve as the next reference points for users deciding how much Codex capacity to buy. (help.openai.com) OpenAI’s current public materials direct Business and Enterprise customers to sales for larger deployments, while Plus and Pro users can extend usage through ChatGPT credits under the token-based system. (help.openai.com)