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

# AI models

## AI models

Quadratic AI uses frontier models tuned for spreadsheet work. Pick a model from the model menu at the bottom of the AI chat panel.

### Available models

| Model                         | Notes                                                               | Availability |
| ----------------------------- | ------------------------------------------------------------------- | ------------ |
| **Claude Sonnet 5** (default) | Best balance of quality and speed for analysis, code, and data work | All plans    |
| **Claude Opus 4.8**           | Most capable model for complex, multi-step analyses                 | Paid plans   |
| **Claude Haiku 4.5**          | Fastest responses for lightweight edits and questions               | Paid plans   |
| **Gemini 3.5 Flash**          | Fast Google model                                                   | Paid plans   |
| **Gemini 3.1 Pro**            | Capable Google model                                                | Paid plans   |

Quadratic routes some background work (like PDF imports and prompt suggestions) to specialized models automatically — you don't need to configure anything.

### Context window indicator

Next to the model menu, a small gauge shows how much of the model's context window your current chat is using. Hover it for a breakdown across conversation, sheet data, memory, and tools. If a long chat approaches the limit, start a fresh chat for better response quality.

### Data handling

Every model provider Quadratic uses has a zero-day data retention policy. See AI security for details, or the self-hosting docs for Bring Your Own Model options.


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