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Grok Code Fast 1 vs Llama 3.1 405B Instruct (Comparative Analysis)

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Comparative Analysis: Grok Code Fast 1 vs. Llama 3.1 405B Instruct
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Overview

Llama 3.1 405B Instruct was released 1 year before Grok Code Fast 1.
Grok Code Fast 1Grok Code Fast 1
Llama 3.1 405B InstructLlama 3.1 405B Instruct
Model Provider
The organization behind this AI's development
XAI logoXAI
Meta logoMeta
Input Context Window
Maximum input tokens this model can process at once
256K
tokens
32.8K
tokens
Output Token Limit
Maximum output tokens this model can generate at once
10K
tokens
16.4K
tokens
Release Date
When this model first became publicly available
August 26th, 2025
July 23rd, 2024

Capabilities & Features

Compare supported features, modalities, and advanced capabilities
Grok Code Fast 1
Llama 3.1 405B Instruct
Input Types
Supported input formats
📝Text
📝Text
Output Types
Supported output formats
📝Text
📝Text
Tokenizer
Text encoding system
GrokLlama3
Key Features
Advanced capabilities
Function CallingStructured OutputReasoning ModeContent Moderation
Function CallingStructured OutputReasoning ModeContent Moderation
Open Source
Model availability
ProprietaryAvailable on HuggingFace →

Pricing

Grok Code Fast 1 is roughly 0.3x less expensive compared to Llama 3.1 405B Instruct for input tokens and roughly 1.9x more expensive for output tokens.
Grok Code Fast 1Grok Code Fast 1
Llama 3.1 405B InstructLlama 3.1 405B Instruct
Input Token Cost
Cost per million input tokens
$0.20
per million tokens
$0.80
per million tokens
Output Token Cost
Cost per million outut tokens
$1.50
per million tokens
$0.80
per million tokens

Benchmarks

Compare relevant benchmarks between Grok Code Fast 1 and Llama 3.1 405B Instruct.
Grok Code Fast 1Grok Code Fast 1
Llama 3.1 405B InstructLlama 3.1 405B 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 Grok Code Fast 1 and Llama 3.1 405B Instruct unique.
XAI logoGrok Code Fast 1 by XAI can use external tools and APIs, offers advanced reasoning, generates structured data. It can handle standard conversations with its 256K token context window. Very affordable at $0.20/M input and $1.50/M output tokens. Released August 26th, 2025.
Meta logoLlama 3.1 405B Instruct by Meta can use external tools and APIs, generates structured data. It can handle standard conversations with its 32.8K token context window. Reasonably priced at $0.80/M input and $0.80/M output tokens. Released July 23rd, 2024.

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