# FAQ

<details>

<summary>What model powers StackAI?</summary>

**Xiaomi MiMo v2.5 Pro**, with a **1M token** context window — large enough to reason over big codebases.

</details>

<details>

<summary>How much does it cost?</summary>

The free tier gives **50 requests/day**. Each step the agent takes counts as one request. Higher tiers are available — see the [Dashboard](https://usestackai.com).

</details>

<details>

<summary>Does it edit my real files?</summary>

Yes. The CLI agent runs **locally** and reads/writes the actual files in your current directory. It shows every change live with a diff, and it never touches anything outside the directory you ran it in.

</details>

<details>

<summary>How is this different from Vibe?</summary>

The **CLI** works on your existing local project. **Vibe** (on the web) generates a brand-new static project from a chat and hands you a `.zip`. Same model, different surface.

</details>

<details>

<summary>How do I sign in?</summary>

Sign in with **X (Twitter)** at [usestackai.com](https://usestackai.com), then create an API key in the Dashboard.

</details>

<details>

<summary>Can I keep my conventions across sessions?</summary>

Yes — add a [`STACKAI.md`](/cli/project-context.md) to your project root. The agent reads it automatically at the start of every session.

</details>

<details>

<summary>It's open source?</summary>

Yes — the code lives on [GitHub](https://github.com/Stackaiagent/Usestackai).

</details>


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# Agent Instructions: Querying This Documentation

If you need additional information that is not directly available in this page, you can query the documentation dynamically by asking a question.

Perform an HTTP GET request on the current page URL with the `ask` query parameter:

```
GET https://docs.usestackai.com/help/faq.md?ask=<question>
```

The question should be specific, self-contained, and written in natural language.
The response will contain a direct answer to the question and relevant excerpts and sources from the documentation.

Use this mechanism when the answer is not explicitly present in the current page, you need clarification or additional context, or you want to retrieve related documentation sections.