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Use models without API keys

The GPT for Work extensions allow you to start using AI models immediately without any setup. The default model is OpenAI gpt-4o. If you want to explore other models, select a different model in the model switcher.

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GPT for Docs is currently free to use, and requires you to set up your own API keys.

Select a model​

The models available in the model switcher without any setup depend on the extension you're using.

  1. Open a Microsoft Excel workbook.

  2. Click GPT for Excel Word in the Home tab.

    Home Ribbon
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    You can also go to Home > Add-ins > My add-ins > GPT for Excel Word.

  3. Expand the model switcher. Models that are available without any setup are listed under No API key needed.

  4. Select a model.

The selected model is used for all responses generated by GPT for Excel.

As a general rule, OpenAI models are more mature and suffer from fewer errors and content restrictions than models from other providers. Here are some models to consider among the models available without an API key:

ModelProviderExcel icon ExcelSheets icon SheetsWord icon WordDescription
gpt-4oOpenAIyesyesyesBest overall balance of easy prompting, speed, quality, reliability, and cost. We recommend this model for most use cases.
gpt-4o-miniOpenAIyesyesyesMost cost-effective option, but more difficult to prompt.
claude-3.5-sonnetAnthropicyesyesyesBest writing and reasoning skills.
gemini-1.5-flashGoogleyesFastest results.

To learn more about a model, hover over the model name in the model switcher. A tooltip opens with detailed information about the model.

What's next

If you need a model that's not available in the model switcher, set up your own API keys.

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