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gpt-oss-20b vs Phi 4 Multimodal Instruct (Comparative Analysis)

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Comparative Analysis: gpt-oss-20b vs. Phi 4 Multimodal Instruct
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Overview

Phi 4 Multimodal Instruct was released 5 months before gpt-oss-20b.
gpt-oss-20bgpt-oss-20b
Phi 4 Multimodal InstructPhi 4 Multimodal Instruct
Model Provider
The organization behind this AI's development
OpenAI logoOpenAI
Microsoft logoMicrosoft
Input Context Window
Maximum input tokens this model can process at once
131.1K
tokens
131.1K
tokens
Output Token Limit
Maximum output tokens this model can generate at once
Not specified
tokens
Not specified
tokens
Release Date
When this model first became publicly available
August 5th, 2025
March 8th, 2025

Capabilities & Features

Compare supported features, modalities, and advanced capabilities
gpt-oss-20b
Phi 4 Multimodal Instruct
Input Types
Supported input formats
📝Text
📝Text🖼️Image
Output Types
Supported output formats
📝Text
📝Text
Tokenizer
Text encoding system
GPTOther
Key Features
Advanced capabilities
Function CallingStructured OutputReasoning ModeContent Moderation
Function CallingStructured OutputReasoning ModeContent Moderation
Open Source
Model availability
Available on HuggingFace →Available on HuggingFace →

Pricing

gpt-oss-20b is roughly 0.6x less expensive compared to Phi 4 Multimodal Instruct for input tokens and roughly 1.4x more expensive for output tokens.
gpt-oss-20bgpt-oss-20b
Phi 4 Multimodal InstructPhi 4 Multimodal Instruct
Input Token Cost
Cost per million input tokens
$0.03
per million tokens
$0.05
per million tokens
Output Token Cost
Cost per million outut tokens
$0.14
per million tokens
$0.10
per million tokens

Benchmarks

Compare relevant benchmarks between gpt-oss-20b and Phi 4 Multimodal Instruct.
gpt-oss-20bgpt-oss-20b
Phi 4 Multimodal InstructPhi 4 Multimodal Instruct
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 gpt-oss-20b and Phi 4 Multimodal Instruct unique.
OpenAI logogpt-oss-20b by OpenAI can use external tools and APIs, offers advanced reasoning, generates structured data. It can handle standard conversations with its 131.1K token context window. Very affordable at $0.03/M input and $0.14/M output tokens. Released August 5th, 2025.
Microsoft logoPhi 4 Multimodal Instruct by Microsoft understands both text and images, generates structured data. It can handle standard conversations with its 131.1K token context window. Very affordable at $0.05/M input and $0.10/M output tokens. Released March 8th, 2025.

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