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GLM 4.1V 9B Thinking vs Grok 4 Fast (Comparative Analysis)

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Comparative Analysis: GLM 4.1V 9B Thinking vs. Grok 4 Fast
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Overview

GLM 4.1V 9B Thinking was released 2 months before Grok 4 Fast.
GLM 4.1V 9B ThinkingGLM 4.1V 9B Thinking
Grok 4 FastGrok 4 Fast
Model Provider
The organization behind this AI's development
THUDM logoTHUDM
XAI logoXAI
Input Context Window
Maximum input tokens this model can process at once
65.5K
tokens
2M
tokens
Output Token Limit
Maximum output tokens this model can generate at once
8K
tokens
30K
tokens
Release Date
When this model first became publicly available
July 11th, 2025
September 19th, 2025

Capabilities & Features

Compare supported features, modalities, and advanced capabilities
GLM 4.1V 9B Thinking
Grok 4 Fast
Input Types
Supported input formats
🖼️Image📝Text
📝Text🖼️Image
Output Types
Supported output formats
📝Text
📝Text
Tokenizer
Text encoding system
OtherGrok
Key Features
Advanced capabilities
Function CallingStructured OutputReasoning ModeContent Moderation
Function CallingStructured OutputReasoning ModeContent Moderation
Open Source
Model availability
Available on HuggingFace →Proprietary

Pricing

GLM 4.1V 9B Thinking is roughly 0.2x less expensive compared to Grok 4 Fast for input tokens and roughly 0.3x less expensive for output tokens.
GLM 4.1V 9B ThinkingGLM 4.1V 9B Thinking
Grok 4 FastGrok 4 Fast
Input Token Cost
Cost per million input tokens
$0.04
per million tokens
$0.20
per million tokens
Output Token Cost
Cost per million outut tokens
$0.14
per million tokens
$0.50
per million tokens

Benchmarks

Compare relevant benchmarks between GLM 4.1V 9B Thinking and Grok 4 Fast.
GLM 4.1V 9B ThinkingGLM 4.1V 9B Thinking
Grok 4 FastGrok 4 Fast
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 GLM 4.1V 9B Thinking and Grok 4 Fast unique.
THUDM logoGLM 4.1V 9B Thinking by THUDM understands both text and images, offers advanced reasoning. It can handle standard conversations with its 65.5K token context window. Very affordable at $0.04/M input and $0.14/M output tokens. Released July 11th, 2025.
XAI logoGrok 4 Fast by XAI understands both text and images, can use external tools and APIs, offers advanced reasoning, generates structured data. It can handle standard conversations with its 2M token context window. Very affordable at $0.20/M input and $0.50/M output tokens. Released September 19th, 2025.

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