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Gemini 2.5 Flash vs Grok 3 (Comparative Analysis)

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Comparative Analysis: Gemini 2.5 Flash vs. Grok 3
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Overview

Grok 3 was released 7 days before Gemini 2.5 Flash.
Gemini 2.5 FlashGemini 2.5 Flash
Grok 3Grok 3
Model Provider
The organization behind this AI's development
Google logoGoogle
XAI logoXAI
Input Context Window
Maximum input tokens this model can process at once
1M
tokens
131.1K
tokens
Output Token Limit
Maximum output tokens this model can generate at once
65.5K
tokens
Not specified
tokens
Release Date
When this model first became publicly available
June 17th, 2025
June 10th, 2025

Capabilities & Features

Compare supported features, modalities, and advanced capabilities
Gemini 2.5 Flash
Grok 3
Input Types
Supported input formats
📁File🖼️Image📝Text🎵Audio
📝Text
Output Types
Supported output formats
📝Text
📝Text
Tokenizer
Text encoding system
GeminiGrok
Key Features
Advanced capabilities
Function CallingStructured OutputReasoning ModeContent Moderation
Function CallingStructured OutputReasoning ModeContent Moderation

Pricing

Gemini 2.5 Flash is roughly 0.10x less expensive compared to Grok 3 for input tokens and roughly 0.2x less expensive for output tokens.
Gemini 2.5 FlashGemini 2.5 Flash
Grok 3Grok 3
Input Token Cost
Cost per million input tokens
$0.30
per million tokens
$3.00
per million tokens
Output Token Cost
Cost per million outut tokens
$2.50
per million tokens
$15.00
per million tokens

Benchmarks

Compare relevant benchmarks between Gemini 2.5 Flash and Grok 3.
Gemini 2.5 FlashGemini 2.5 Flash
Grok 3Grok 3
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 Gemini 2.5 Flash and Grok 3 unique.
Google logoGemini 2.5 Flash by Google understands both text and images, handles audio, can use external tools and APIs, offers advanced reasoning, generates structured data. It can handle standard conversations with its 1M token context window. Reasonably priced at $0.30/M input and $2.50/M output tokens. Released June 17th, 2025.
XAI logoGrok 3 by XAI can use external tools and APIs, generates structured data. It can handle standard conversations with its 131.1K token context window. Premium pricing at $3.00/M input and $15.00/M output tokens. Released June 10th, 2025.

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