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Phi-4-reasoning

MicrosoftOpen WeightsPending Human Review

Phi-4-reasoning is an MIT-licensed open-weight model in Microsoft’s Phi family. It fine-tunes Phi-4 with curated reasoning demonstrations. Reasoning-plus adds outcome-based reinforcement learning and longer reasoning traces. Weights and sample inference code are available on Hugging Face, with deployment through supported local runtimes or hosted platforms. This checkpoint is a static trained model; accuracy and language coverage vary by task. Small model efficiency should not be taken as equal capability to much larger generalist systems.

2025-04-30
14B
Dense decoder-only Transformer
MIT

Specifications

Parameters
14B
Architecture
Dense decoder-only Transformer
License
MIT
Context Window
32,768 tokens
Type
text
Modalities
text

Benchmark Scores

Advanced Specifications

Model Family
Phi
Finetuned From
Phi-4
API Access
Available
Chat Interface
Not Available
Variants
Phi-4-reasoningPhi-4-reasoning-plus

Capabilities & Limitations

Capabilities
instruction followingreasoningcoding
Known Limitations
May hallucinate or produce incorrect reasoningPrimarily English evaluation and training
Notable Use Cases
local assistantsresearchdomain adaptation

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