> ## Documentation Index
> Fetch the complete documentation index at: https://captions.ai/llms.txt
> Use this file to discover all available pages before exploring further.

# AI Chat

> Ask chat to edit the open project, attach media, and choose the model that runs the turn.

Chat is the first tool in the editor. It edits the project you have open: captions, cuts, layers, and generated media.

![Chat panel with suggested prompts and the Haiku 5.5 model picker](https://mintcdn.com/captions/YNtloFB9-FRoI6fN/help/web/images/editor.png?fit=max\&auto=format\&n=YNtloFB9-FRoI6fN\&q=85\&s=f55d6bd9e49efb40b0f48b82f6409398)

**1. Open Chat**

Select **Chat** on the tool rail. On a new project, Captions suggests prompts such as **Create an opening hook**, **Add caption styling**, **Build a visual backdrop**, **Add narration**, and **Create alternate cut**.

**2. Describe the change**

Type in **Tell me how I can help edit your video**. Be specific about the time range, the layer, or the words.

Example: "Add two arrows pointing at the camera from 9 to 13 seconds, and keep the captions readable."

**3. Attach media or mark the frame**

**+** is **Add or generate media**. Use it to attach a file or ask for generated media. **Add annotations** marks up the frame so the model can see what you mean.

**4. Choose a model**

Open the model menu beside the message field.

![Model menu with Haiku 5.5, Sonnet 5.5, Opus 5.5, GPT 6 Luna, GPT 6.1 Terra, GPT 6.1 Sol, GPT 6 Astra, and Gemini Argon](https://mintcdn.com/captions/YNtloFB9-FRoI6fN/help/web/images/chat-models.png?fit=max\&auto=format\&n=YNtloFB9-FRoI6fN\&q=85\&s=6bc2114064aa79cccccc9e8e1fa8846b)

| Model | Note in the menu |
| - | - |
| Haiku 5.5 | Fast and affordable. This is the default. |
| Sonnet 5.5 | Marked New. |
| Opus 5.5 | Most capable. |
| GPT 6 Luna | |
| GPT 6.1 Terra | Marked New. |
| GPT 6.1 Sol | |
| GPT 6 Astra | |
| Gemini Argon | |

Pick a faster model for a small caption or timing change. Pick Opus 5.5 when the edit has several layers, generated media, or a custom graphic.

**5. Send and review**

Select the send arrow. Chat reports what it inspected and what it changed. The timeline updates when the turn finishes. Undo is in the header if you want the previous state back.

The **…** menu on the Chat header can copy the chat thread ID if you need to refer to that conversation.

Chat follows the project that is open. Switch projects from the sidebar when the instruction belongs to a different video.


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