Using Phi 4 Reasoning on Microsoft Foundry

Implementation guide · Phi-4 · Microsoft Research

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Microsoft Foundry exposes Phi 4 Reasoning through model ID phi-4-reasoning. Use the setup steps, sourced pricing, capabilities, and official provider links below to validate this route before deployment.

Last refreshed 2026-06-04. Next refresh: weekly.

Quick Start

1
Create an account at Microsoft Foundry and generate an API key.
2
Use the Microsoft Foundry SDK or REST API to call phi-4-reasoning — see the documentation for request format.

API Portal Documentation Pricing

Code Examples

See Microsoft Foundry documentation for integration details.

Pricing on Microsoft Foundry

Capabilities

Reasoning

About Phi 4 Reasoning

Phi 4 Reasoning is Microsoft Research's Phi-4 model focused on step-by-step reasoning. It offers a 128K-token context window with weights openly available for self-hosting and scores 65.8 on GPQA.

Full model details →

Model Specs

Released2025-01-01

Parameters14B

Context128k

ArchitectureDecoder Only

Knowledge cutoff2025-03

Microsoft

Redmond, Washington, United States