Pay per usage
What is pay per usage?
Section titled “What is pay per usage?”For our Pro and Standard plan users only, once you cross your plan’s included monthly credits in Google Sheets GPT formulas (25M for Standard, 100M for Pro), we will block the requests and ask you to activate pay per usage.
Once activated this will let you continue use unlimited credits at the cost of $0.006 USD (or subscription currency equivalent) per 1000 credits.
How to activate pay per usage?
Section titled “How to activate pay per usage?”- Open the addon sidebar in Google Sheets via the extensions menu
- Click on the wheel on the top right
- Then click on “Subscription”
- Click on “Activate pay per usage”
How to track my pay per usage spent?
Section titled “How to track my pay per usage spent?”Open the sidebar, click on the settings wheel on the upper right corner, then subscription. You should see the amount of US Dollars that will be billed at the end of the month.
Cost Table with Pay per Usage
Section titled “Cost Table with Pay per Usage”A credit always costs $0.006 USD per 1,000 credits, regardless of which model you use. What differs between models is how many credits are consumed to generate the same amount of text: the Advanced Model consumes 5x more credits per token than the Standard Model. The table below shows the credits consumed, and resulting cost, to generate the same amount of words with each model.
| Words generated (english) | Standard credits / cost | Advanced credits / cost |
|---|---|---|
| ≃ 800 words (5,000 characters) | 1,000 credits / 0.006$ | 5,000 credits / 0.03$ |
| ≃ 8,000 words (50,000 characters) | 10,000 credits / 0.06$ | 50,000 credits / 0.30$ |
| ≃ 80,000 words (500,000 characters) | 100,000 credits / 0.60$ | 500,000 credits / 3$ |
Web search formulas (=GPT_WEB)
Section titled “Web search formulas (=GPT_WEB)”=GPT_WEB uses our Web Search Model with live web access. Because every call performs real web searches, it consumes a minimum of 5,000 credits per call ($0.03), even for short answers. Longer answers are billed at 5 credits per token, like the Advanced Model.
Image formulas (=GPT_IMAGE)
Section titled “Image formulas (=GPT_IMAGE)”Image models consume credits per token like text models, but each model has its own multiplier (see Image Models). Typical cost per generated image:
| Model | Credits / token | Typical credits / image | Typical cost / image |
|---|---|---|---|
| Gemini 3.1 Flash Lite (default) | 6 | ≃ 8,400 | ≃ $0.05 |
| GPT Image 1 mini | 5 | ≃ 5,500 | ≃ $0.03 |
| GPT Image 2 (paid plans) | 15 | ≃ 3,700 – 63,000 depending on quality | ≃ $0.02 – $0.38 |
| Gemini 3 Pro Image (paid plans) | 30 | ≃ 42,000 | ≃ $0.25 |
Token counts per image vary with the model and the requested quality, so these figures are estimates.
For more details, check our blog post: Understanding OpenAI GPT Tokens
When will I be billed?
Section titled “When will I be billed?”If you have a monthly PRO subscription you will be billed at the same time as your monthly subscription.
If you have a yearly subscription you will be billed every month starting on the day you activated pay per usage.