As of February 13, 2026, models GPT-4o, GPT-4.1, GPT-4.1 mini, OpenAI o4-mini, and GPT-5 (Instant and Thinking) have been retired from ChatGPT and are no longer available. API access remains unchanged.
For more information, please refer to our article: Retiring GPT-4o and other ChatGPT models
Note: As of August 29th, 2025, we've renamed ChatGPT Team to ChatGPT Business. For more information and questions related to the name change, please refer to our article: ChatGPT Business Rename FAQ
The ChatGPT Business subscription is a self-serve subscription plan designed for organizations and businesses wishing to adopt ChatGPT for use among their teams. ChatGPT Business is available for 2 or more users. If you're looking for a larger option, please consider ChatGPT Enterprise.
If you are on ChatGPT flexible pricing, please refer to this page for latest rates on our models, features and products.
Model Picker
The model picker uses simplified controls to help you choose the balance of speed and reasoning effort that works best for your task.
Instant — Fast responses for everyday questions, powered by GPT-5.5 Instant.
Medium — Standard reasoning, powered by GPT-5.5 Thinking. This was previously Thinking Standard.
High — Extended reasoning, powered by GPT-5.5 Thinking. This was previously Thinking Extended.
Extra High — The highest reasoning effort with GPT-5.5 Thinking. This was previously Thinking Heavy.
Pro Standard — GPT-5.5 Pro with standard reasoning effort.
Pro Extended — GPT-5.5 Pro with extended reasoning effort.
Thinking Light is no longer available.
Instant can automatically switch to Medium when a request benefits from more reasoning. Select Configure in the model picker to turn automatic switching on or off.
On iOS and Android, the picker appears at the top of the conversation. On web, it appears in the message composer.
The picker labels do not change the underlying models or usage limits.
The context window is 128K for GPT-5.5 Instant and GPT-5.5 Thinking, and 272K for GPT-5.5 Pro.
Note on Unlimited Access
The ChatGPT Business plan offers virtually unlimited messages for the base models. However, usage must adhere to our Services Agreement, which prohibits, among other things:
Abusive usage, such as automatically or programmatically extracting data.
Sharing your account credentials or making your account available to anyone else.
Reselling access or using ChatGPT to power third-party services.
We have guardrails in place to help prevent misuse and are always working to improve our systems. This may occasionally involve a temporary restriction on your usage. We will inform you when this happens, and if you think this might be a mistake, please don’t hesitate to reach out to our support team. If policy-violating behavior is not found, your access will be restored.
Models and limits
Please note that GPT-5.4 and GPT-5.2 have separate usage limit counters.
| Usage Limit | Capabilities | Inputs | |
|---|---|---|---|
| GPT-5.5-Instant | Virtually unlimited | GPTs Data analysis Search Image generation Canvas Deep research | Documents Images CSVs Audio |
| GPT-5.5 Thinking | 3000 requests / week | GPTs Data analysis Search Image generation Canvas Deep research | Documents Images CSVs Audio |
| GPT-5.5 Pro | 15 requests / month | GPTs Data analysis Search Deep research | Documents Images CSVs Audio |