# Phi

Family of small open-weight language models from Microsoft, designed for strong reasoning at compact sizes.

- Company: Microsoft
- Category: Open Models
- Business model: Open (open weights/source)
- Availability: global
- Launched: 2023
- Tags: open-weights, small-language-model, llm
- Website: https://azure.microsoft.com/en-us/products/phi
- Canonical URL: https://globalaiproductindex.com/products/phi/
- Record updated: 2026-07-24

## Sources

- [Official website](https://azure.microsoft.com/en-us/products/phi)

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Data from the [Global AI Product Index](https://globalaiproductindex.com/), licensed CC BY 4.0.