Microsoft
Redmond-based company whose Phi family comprises small language models released with open weights.
| Model | Released | Weights | Hosts | Cheapest host | Input | Output |
|---|---|---|---|---|---|---|
| Phi 4 | Dec 2024 | — | 1 | DeepInfra | $0.07 | $0.14 |
1 of 1 models · prices per million tokens at the cheapest host, read Oct 23, 09:51 UTC
About Microsoft
- Headquarters
- Redmond, Washington, USA1
- Led by
- Satya Nadella (Chairman and CEO)1
- Mission
- "empower every person and every organization on the planet to achieve more"11
Microsoft was founded in April 1975 in Albuquerque, New Mexico, by Bill Gates and Paul Allen.1, 6, 7
Gates moved away from his day-to-day role at the company in June 2008.1, 7
The company has its corporate address in Redmond, Washington, and as of September 2026 Satya Nadella is its chairman and chief executive officer.1
Microsoft states its mission as to "empower every person and every organization on the planet to achieve more".11
Within its language model activity, the Phi family began with phi-1, a language model for code introduced in June 2023.5, 8, 9
Microsoft Research released Phi-2 in December 2023.5
The phi-3 technical report of April 2024 introduced phi-3-mini, a model with 3.8 billion parameters trained on 3.3 trillion tokens.12
The same report also describes the phi-3.5 series, which includes phi-3.5-mini, phi-3.5-MoE and phi-3.5-Vision.12
Phi-4, a 14-billion parameter model developed with a training recipe centered on data quality, was presented in a technical report in December 2024.13
In March 2026 Microsoft Research announced Phi-4-reasoning-vision-15B, an open-weight multimodal reasoning model with 15 billion parameters.4
The Phi models reviewed are published with open weights and list the MIT license on their model cards.2, 3, 4
For models deployed through the Azure AI Foundry model catalog, prompts and outputs are processed within the geography chosen at deployment.1, 10
Official links
- Website microsoft.com
- API docs learn.microsoft.com/en-us/azure
- Pricing azure.microsoft.com/en-us/pricing/details/phi-3
- Hugging Face huggingface.co/microsoft
- Blog microsoft.com/en-us/research/blog
- X x.com/microsoft
- LinkedIn linkedin.com/company/microsoft
Sources
- Facts About Microsoft - Stories · news.microsoft.com · read Oct 23
- microsoft/phi-4 README.md (raw) | Hugging Face · huggingface.co · read Oct 23
- microsoft/Phi-3.5-mini-instruct README.md (raw) | Hugging Face · huggingface.co · read Oct 23
- Phi-4-reasoning-vision and the lessons of training a multimodal reasoning model - Microsoft Research · microsoft.com · read Oct 23
- Phi-2: The surprising power of small language models - Microsoft Research · microsoft.com · read Oct 23
- Momentos destacados en la historia de Microsoft – Centro de noticias · news.microsoft.com · read Oct 23
- Microsoft celebrates 50 years · news.microsoft.com · read Oct 23
- Textbooks Are All You Need - Microsoft Research · microsoft.com · read Oct 23
- [2306.11644] Textbooks Are All You Need · arxiv.org · read Oct 23
- Data, privacy, and security for use of models through the model catalog in Microsoft Foundry portal (classic) - Microsoft Foundry (classic) portal | Microsoft Learn · learn.microsoft.com · read Oct 23
- Our Mission and Values | About Microsoft · microsoft.com · read Oct 23
- [2404.14219] Phi-3 Technical Report: A Highly Capable Language Model Locally on Your Phone · arxiv.org · read Oct 23
- [2412.08905] Phi-4 Technical Report · arxiv.org · read Oct 23
Every fact above links to its source and the date it was read; last checked Oct 23. Not affiliated with Microsoft. Corrections or removal on request: contact.