API vs Subscription
Subscriptions are for using AI tools. APIs are for building AI features into products.
Subscription
Pay a fixed monthly fee to use AI tools directly.
- ChatGPT / Claude / Gemini apps
- Codex / Claude Code / Cursor
- GitHub Copilot
API
Pay per usage to build AI into your own products.
- OpenAI API
- Anthropic API
- Google Gemini API
- DeepSeek API
Which do you need?
| Use case | Subscription | API |
|---|---|---|
| Personal coding | Good | Sometimes |
| Building a chatbot | No | Yes |
| Internal automation | Sometimes | Yes |
| SaaS feature | No | Yes |
| Cost per user control | Limited | Yes |
If you are using ChatGPT, Codex, Claude Code, Cursor, or Copilot directly, you may not need API pricing.
If you are building AI features into your own product, API pricing matters.