OpenAI will combine ChatGPT and Codex usage limits starting in December

OpenAI expects most subscribers will not have to wait for usage resets more often, even as it combines their ChatGPT and Codex allowances. Starting in December, Plus, Pro and Business plans will share a token-based usage budget across both products. Instant chat will be excluded, leaving that activity outside the shared limit.

The model and task determine consumption

OpenAI’s usage-policy notice ties the change to bringing Work’s agentic capabilities into the main ChatGPT experience. The company says it is preparing for the transition to help prevent disruption to users’ workflows.

Usage will be measured in tokens—the units of information a model processes and generates. That means the meter covers information going into the model as well as what it produces. How much of the allowance a task consumes will depend on the model selected and the work requested. OpenAI says more advanced models and more complex tasks generally use more of the allowance.

The notice does not give token allotments for each plan or specify a reset schedule. It therefore does not provide a numerical comparison of the capacity subscribers will receive before and after the transition, despite setting out how consumption will be counted.

One balance to check, three options at the limit

Subscribers will be able to check their combined remaining allowance across ChatGPT and Codex, along with reset times, in Settings → Usage.

If subscribers exhaust the shared allowance, OpenAI lists three routes for handling the limit:

• Wait for the usage allowance to reset.
• Upgrade the subscription plan.
• Buy credits to continue using eligible features.

The transition notice names December as the starting month but does not specify an exact day for the switch.