OpenAI is changing how subscribers use ChatGPT and Codex, bringing advanced conversations and coding tasks under one usage allowance. The move could affect how developers and IT teams manage their AI workloads.
Starting in December 2026, OpenAI will introduce a shared usage allowance across ChatGPT and Codex for Plus, Pro, and Business subscribers. Instant chats will remain exempt, while the accounting rules for individual advanced features have not been fully detailed.
The uncertainty leaves organizations using both tools without a clear way to calculate future consumption or compare the new limits with their existing subscriptions.
ChatGPT plans affected by the December change
The shared allowance will apply to Plus, Pro, and Business subscribers, according to OpenAI’s usage guidance. The company has not announced the same December change for Free, Go, Enterprise, or Edu accounts.
Codex is available across ChatGPT plans, including Free and Go, although capabilities and usage limits vary by subscription. Codex Cloud is restricted to eligible paid plans and remains subject to rollout and workspace settings. TechRepublic’s ChatGPT cheat sheet provides a breakdown of available plans, models, and features.
The change accompanies OpenAI’s effort to integrate ChatGPT Work’s agentic capabilities into the main ChatGPT experience. Work handles longer, multistep tasks, while Codex supports software development activities. The products already share allowances under certain subscriptions.
A separate October 29, 2026, update doubled Work and Codex allowances for Pro 100 and Pro 500 subscribers. OpenAI also canceled a planned reduction for Pro 200 users. Those already receiving the higher allowance kept it, while subscribers on lower limits received an increase.
Those adjustments apply to existing allowances, not the December arrangement. Subscribers comparing Pro 500 and Pro 200 will therefore need updated usage figures before assessing whether a higher-priced plan offers sufficient value.
How the shared usage allowance will work
Combined usage will be measured in tokens, the units of information AI models process and generate. Consumption will depend on the selected model and task complexity, with more demanding workloads generally using more allowance.
A developer using Codex for code review and ChatGPT for complex technical analysis could draw from the same pool. Teams already comparing coding agents such as Codex and Claude Code may also need to consider how shared usage limits affect their development workflows.
Instant chats will not count toward the shared allowance. OpenAI has yet to explain how every advanced ChatGPT feature will be accounted for or publish the numerical limits and reset schedules for the December system.
Once the policy takes effect, subscribers will be able to view their combined remaining allowance and reset times under Settings → Usage. Those reaching their limit can wait for a reset, upgrade, or purchase credits for eligible features.
OpenAI expects most subscribers will not have to wait for resets more frequently than they currently do, although that remains untested under the new arrangement.
Organizations using both services can establish a baseline of their current usage before the December transition. Whether the new limits accommodate their existing workloads will become clearer once OpenAI publishes the allowances for each plan.
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