# What is Gross Margin?

Revenue minus the direct cost of delivering it, usually shown as a share of revenue. For AI features, inference is part of that cost, so heavy use on a flat plan can push it toward zero or below.

## In real work

Gross margin on the flat plan slid as power users ran agents all day, so the team added usage tiers before touching the base price.

## Related terms

- [Capability](https://prompthausapp.com/learn/capability.md)
- [Tool Use](https://prompthausapp.com/learn/tool-use.md)
- [Computer Use](https://prompthausapp.com/learn/computer-use.md)
- [Model Generation](https://prompthausapp.com/learn/model-generation.md)
- [Golden Set](https://prompthausapp.com/learn/golden-set.md)

## How is this different from Googling it?

Google gives a definition. Prompthaus pairs each term with how it shows up in standups, PRs, prompts, and design reviews. Then it quizzes you until the word sticks. One term a day on iPhone.

- Category: AI Product
- HTML: https://prompthausapp.com/learn/gross-margin
- App Store: https://apps.apple.com/us/app/prompthaus-ai-vocabulary/id6776314407