If you mean a ChatGPT subscription, Plus costs $20 USD per month, billed monthly. That is the price of the Plus plan—not a separate GPT-4 purchase. OpenAI retired GPT-4o, GPT-4.1, and GPT-4.1 mini from ChatGPT on February 13, 2026. Its retirement notice does not name the original GPT-4 model, so check your account’s model picker rather than assuming that GPT-4 has the same status. (ChatGPT Plus pricing; OpenAI retirement notice) (help.openai.com)
ChatGPT price: $20 per month for Plus
OpenAI lists ChatGPT Plus at $20 per month, billed monthly. It is a subscription for enhanced access to ChatGPT, not a GPT-4-specific purchase; model availability and usage limits can change. The retirement notice names GPT-4o, GPT-4.1, GPT-4.1 mini, and OpenAI o4-mini as retired from ChatGPT on February 13, 2026. It says Business, Enterprise, and Edu customers retained GPT-4o in Custom GPTs only until April 3, 2026; that exception has passed. The notice does not state a retirement date for the original GPT-4 model, so its current availability should be checked in the model picker. (help.openai.com)
GPT-4o API price: separate, token-based billing
API usage is billed separately from a ChatGPT subscription. For the API model identifier gpt-4o, OpenAI’s pricing page lists these standard rates in U.S. dollars per 1 million tokens: (help.openai.com)
| GPT-4o API usage | Standard price per 1 million tokens |
|---|---|
| Input tokens | $2.50 |
| Cached input tokens | $1.25 |
| Output tokens | $10.00 |
These are the standard rates, not Batch rates; OpenAI lists Batch pricing separately. OpenAI’s GPT-4o model page marks the model deprecated and lists its API endpoints and rate information. Deprecation is not itself a shutdown date, but it is a lifecycle warning: check current model availability for your API account before starting or budgeting a production integration. (developers.openai.com)
Example API calculation
For one illustrative request with 10,000 input tokens and 2,000 output tokens, assuming no cached input and no separately priced tools:
- Input: 10,000 ÷ 1,000,000 × $2.50 = $0.025
- Output: 2,000 ÷ 1,000,000 × $10.00 = $0.020
- Total: $0.045 at the listed standard rates.
This is an arithmetic example, not a bill or a test. Actual cost depends on token usage and any applicable additional charges. ChatGPT subscriptions and API usage use separate billing systems. (developers.openai.com)
Which price should you use?
- You want to use ChatGPT: Plus is $20/month. That does not mean GPT-4o or GPT-4.1 is included; OpenAI lists those models as retired from ChatGPT. Check the model picker for current access, especially if you mean the original GPT-4 model.
- You are building an application: use the API rate for the exact model and pricing mode. The figures above are standard
gpt-4oAPI rates; the model is marked deprecated, so confirm availability before relying on it for production.
Bottom line: ChatGPT Plus costs $20/month; GPT-4o API use is separately priced by token. GPT-4o, GPT-4.1, and GPT-4.1 mini were retired from ChatGPT on February 13, 2026. The cited retirement notice does not establish the original GPT-4 model’s current availability. (help.openai.com)
Sources
What is ChatGPT Plus? — OpenAI Help Center
Retiring GPT-4o and other ChatGPT models — OpenAI Help Center
Managing billing for ChatGPT and the API platform — OpenAI Help Center