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Claude Sonnet 4 vs Phi 4 Reasoning Plus (Comparative Analysis)

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Comparative Analysis: Claude Sonnet 4 vs. Phi 4 Reasoning Plus
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Overview

Phi 4 Reasoning Plus was released 21 days before Claude Sonnet 4.
Claude Sonnet 4Claude Sonnet 4
Phi 4 Reasoning PlusPhi 4 Reasoning Plus
Model Provider
The organization behind this AI's development
Anthropic logoAnthropic
Microsoft logoMicrosoft
Input Context Window
Maximum input tokens this model can process at once
1M
tokens
32.8K
tokens
Output Token Limit
Maximum output tokens this model can generate at once
64K
tokens
Not specified
tokens
Release Date
When this model first became publicly available
May 22nd, 2025
May 1st, 2025

Capabilities & Features

Compare supported features, modalities, and advanced capabilities
Claude Sonnet 4
Phi 4 Reasoning Plus
Input Types
Supported input formats
🖼️Image📝Text📁File
📝Text
Output Types
Supported output formats
📝Text
📝Text
Tokenizer
Text encoding system
ClaudeOther
Key Features
Advanced capabilities
Function CallingStructured OutputReasoning ModeContent Moderation
Function CallingStructured OutputReasoning ModeContent Moderation
Open Source
Model availability
ProprietaryAvailable on HuggingFace →

Pricing

Claude Sonnet 4 is roughly 42.9x more expensive compared to Phi 4 Reasoning Plus for input tokens and roughly 42.9x more expensive for output tokens.
Claude Sonnet 4Claude Sonnet 4
Phi 4 Reasoning PlusPhi 4 Reasoning Plus
Input Token Cost
Cost per million input tokens
$3.00
per million tokens
$0.07
per million tokens
Output Token Cost
Cost per million outut tokens
$15.00
per million tokens
$0.35
per million tokens

Benchmarks

Compare relevant benchmarks between Claude Sonnet 4 and Phi 4 Reasoning Plus.
Claude Sonnet 4Claude Sonnet 4
Phi 4 Reasoning PlusPhi 4 Reasoning Plus
MMLU
Measures knowledge across 57 subjects like law, math, history, and science
Benchmark not available.
Benchmark not available.
MMMU
Measures understanding of combined text and images across various domains
Benchmark not available.
Benchmark not available.
HellaSwag
Measures common sense reasoning by having models complete sentences about everyday situations
Benchmark not available.
Benchmark not available.

At a Glance

Quick overview of what makes Claude Sonnet 4 and Phi 4 Reasoning Plus unique.
Anthropic logoClaude Sonnet 4 by Anthropic understands both text and images, can use external tools and APIs, offers advanced reasoning. It can handle standard conversations with its 1M token context window. Premium pricing at $3.00/M input and $15.00/M output tokens. Released May 22nd, 2025.
Microsoft logoPhi 4 Reasoning Plus by Microsoft offers advanced reasoning, generates structured data. It can handle standard conversations with its 32.8K token context window. Very affordable at $0.07/M input and $0.35/M output tokens. Released May 1st, 2025.

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