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Phi 4 Reasoning Plus Model Specs, Costs & Benchmarks (September 2025)

Phi 4 Reasoning Plus, developed by Microsoft, features a context window of 32.8K tokens. The model costs $0.07 per million tokens for input and $0.35 per million tokens for output. It was released on May 1, 2025, and has achieved impressive scores in various benchmarks.
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Overview

Phi 4 Reasoning PlusPhi 4 Reasoning Plus
Model Provider
The organization behind this AI's development
Microsoft logoMicrosoft
Input Context Window
Maximum input tokens this model can process at once
32.8K
tokens
Output Token Limit
Maximum output tokens this model can generate at once
Not specified
tokens
Release Date
When this model first became publicly available
May 1st, 2025

Pricing

Phi 4 Reasoning PlusPhi 4 Reasoning Plus
Input Token Cost
Cost per million input tokens
$0.07
per million tokens
Output Token Cost
Cost per million output tokens
$0.35
per million tokens

Capabilities & Features

Phi 4 Reasoning PlusPhi 4 Reasoning Plus
Input Types
Supported input formats
text
Output Types
Supported output formats
text
Tokenizer
Text encoding system
Other
Key Features
Advanced capabilities
✓ Structured Output✓ Reasoning Mode
Open Source
Model availability

Benchmarks

Phi 4 Reasoning PlusPhi 4 Reasoning Plus
MMLU
Measures knowledge across 57 subjects like law, math, history, and science
Not available
MMMU
Measures understanding of combined text and images across various domains
Not available
HellaSwag
Measures common sense reasoning by having models complete sentences about everyday situations
Not available

Compare This Model

See how Phi 4 Reasoning Plus compares with other top models