> For the complete documentation index, see [llms.txt](https://docs.eitherway.ai/llms.txt). Markdown versions of documentation pages are available by appending `.md` to page URLs; this page is available as [Markdown](https://docs.eitherway.ai/prompting-guide/eitherway-prompting-guide/model-toggle-guide.md).

# Model Toggle Guide

#### Eitherway lets you switch between models in real time. Use this as a guide:

<div data-with-frame="true"><figure><img src="/files/URuvZuUMITrpABVomIXh" alt=""><figcaption></figcaption></figure></div>

| **Use Sonnet when:**         | **Use Opus when:**            |
| ---------------------------- | ----------------------------- |
| Building UI and layouts      | Debugging complex logic       |
| Fast iteration and testing   | Multi-step workflows          |
| Simple CRUD applications     | Smart contract integration    |
| Landing pages and dashboards | Complex data relationships    |
| Quick MVP prototyping        | System architecture decisions |

**Rule of thumb:** Start with Sonnet. Switch to Opus when the system gets complex or something breaks.