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Getting started with the Inflection AI API

Inflection-3 comprises three primary models designed for distinct purposes:


  • Pi (3.1): the latest model fine-tuned from a Llama base model, including a backstory, emotional intelligence, tool calling, and more. It excels in scenarios such as customer support chatbots or agentic workflows. Set the model or config field in the API request body to "Pi-3.1" to use this model.
  • Pi (3.0): the legacy model powering our pi.ai and Pi iOS app experiences, including a backstory, emotional intelligence, productivity, and safety. It excels in scenarios such as customer support chatbots. Set the model or config field in the API request body to "inflection_3_pi" to use this model.
  • Productivity (3.0): the legacy model optimized for following instructions. It is better for tasks requiring JSON output or precise adherence to provided guidelines. Set the model or config field in the API request body to "inflection_3_productivity" to use this model.

How to use Inflection models


Things to try

Pi has been trained to mirror your tone and style, if you use more emojis, so will Pi! Try experimenting with various prompts and conversation styles in the Playground.


As a reminder, you may not (i) use the Inflection APIs in a way that infringes, misappropriates or violates any person's rights; (ii) reverse assemble, reverse compile, decompile, translate or otherwise attempt to discover the source code or underlying components of models, algorithms, and systems of the Inflection APIs (except to the extent such restrictions are contrary to applicable law); (iii) use output from the Inflection APIs to develop models that compete with Inflection; (iv) represent that output from the Inflection APIs was human-generated; (v) buy, sell, or transfer API keys without Inflection's prior consent; or (vi), send Inflection any "personal information", "personal data", or any other information that is regulated by applicable laws.

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