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Gemma 3 27B vs GPT-5 Chat (Comparative Analysis)

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Comparative Analysis: Gemma 3 27B vs. GPT-5 Chat
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Overview

Gemma 3 27B was released 4 months before GPT-5 Chat.
Gemma 3 27BGemma 3 27B
GPT-5 ChatGPT-5 Chat
Model Provider
The organization behind this AI's development
Google logoGoogle
OpenAI logoOpenAI
Input Context Window
Maximum input tokens this model can process at once
96K
tokens
400K
tokens
Output Token Limit
Maximum output tokens this model can generate at once
8.2K
tokens
128K
tokens
Release Date
When this model first became publicly available
March 12th, 2025
August 7th, 2025

Capabilities & Features

Compare supported features, modalities, and advanced capabilities
Gemma 3 27B
GPT-5 Chat
Input Types
Supported input formats
📝Text🖼️Image
📁File🖼️Image📝Text
Output Types
Supported output formats
📝Text
📝Text
Tokenizer
Text encoding system
GeminiGPT
Key Features
Advanced capabilities
Function CallingStructured OutputReasoning ModeContent Moderation
Function CallingStructured OutputReasoning ModeContent Moderation

Pricing

Gemma 3 27B is roughly 0.06x less expensive compared to GPT-5 Chat for input tokens and roughly 0.03x less expensive for output tokens.
Gemma 3 27BGemma 3 27B
GPT-5 ChatGPT-5 Chat
Input Token Cost
Cost per million input tokens
$0.07
per million tokens
$1.25
per million tokens
Output Token Cost
Cost per million outut tokens
$0.27
per million tokens
$10.00
per million tokens

Benchmarks

Compare relevant benchmarks between Gemma 3 27B and GPT-5 Chat.
Gemma 3 27BGemma 3 27B
GPT-5 ChatGPT-5 Chat
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 Gemma 3 27B and GPT-5 Chat unique.
Google logoGemma 3 27B by Google understands both text and images, generates structured data. It can handle standard conversations with its 96K token context window. Very affordable at $0.07/M input and $0.27/M output tokens. Released March 12th, 2025.
OpenAI logoGPT-5 Chat by OpenAI understands both text and images, offers advanced reasoning, generates structured data. It can handle standard conversations with its 400K token context window. Reasonably priced at $1.25/M input and $10.00/M output tokens. Includes built-in content moderation for safer outputs. Released August 7th, 2025.

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