GPT-4o vs Llama 3.1 405B

Compare two of the most advanced AI models available today. Find out which one suits your needs better.

Quick Overview

GPT-4o

by OpenAI

GPT-4o ('o' for 'omni') is OpenAI's flagship multimodal model, designed for real-time, human-like interaction across text, audio, and vision.

Modalities

TextImageAudioVideo

Best For

Real-time voice assistants, customer service bots, and applications requiring fast visual understanding.

Llama 3.1 405B

by Meta

Llama 3.1 405B is the first open-weights model to rival the top proprietary models like GPT-4o. It enables developers to run state-of-the-art AI on their own infrastructure.

Modalities

Text

Best For

Enterprises requiring data privacy, fine-tuning for specific domains, and research.

Performance Benchmarks

MMLU (Massive Multitask Language Understanding)

GPT-4o88.7%

Llama 3.1 405B88.6%

GPQA (Graduate-Level Google-Proof Q&A)

GPT-4o55.4%

Llama 3.1 405B52%

HumanEval (Code Generation)

GPT-4o90.2%

Llama 3.1 405B89%

Feature Comparison

Feature	GPT-4o	Llama 3.1 405B
Context Window	128k tokens	128k tokens
Real-time Voice
Interactive Code Artifacts
Open Source
API Cost (Input)	$5/1M tokens	$0/1M tokens
API Cost (Output)	$15/1M tokens	$0/1M tokens

Strengths & Weaknesses

GPT-4o

Strengths

•Extremely fast response times
•State-of-the-art multimodal capabilities
•Highly conversational and natural interaction
•Free tier access is very generous

Weaknesses

•Reasoning can sometimes be shallower than GPT-4 Turbo
•Rate limits on the free tier can be restrictive for heavy users

Llama 3.1 405B

Strengths

•Open weights for private deployment
•Comparable performance to GPT-4o
•Huge ecosystem support
•No API dependency (if self-hosted)

Weaknesses

•Requires massive GPU memory to run
•Text-only in base version (no native vision/audio)
•Setup complexity for self-hosting

What Users Are Saying

GPT-4o Users

“Users widely praise GPT-4o for its conversational speed and impressive vision capabilities, though some note it can occasionally be less detailed in reasoning tasks compared to its predecessor, GPT-4 Turbo.”

Llama 3.1 405B Users

“ The open-source community celebrates Llama 3.1 405B as a milestone for democratizing AI. It's powerful but requires significant hardware resources to run locally.”

Final Verdict

The ultimate closed vs. open comparison. GPT-4o provides a polished, managed multimodal service. Llama 3.1 405B delivers comparable intelligence with the freedom to deploy privately on your own hardware.

Quick Overview

GPT-4o

by OpenAI

GPT-4o ('o' for 'omni') is OpenAI's flagship multimodal model, designed for real-time, human-like interaction across text, audio, and vision.

Modalities

TextImageAudioVideo

Best For

Real-time voice assistants, customer service bots, and applications requiring fast visual understanding.

Llama 3.1 405B

by Meta

Llama 3.1 405B is the first open-weights model to rival the top proprietary models like GPT-4o. It enables developers to run state-of-the-art AI on their own infrastructure.

Modalities

Text

Best For

Enterprises requiring data privacy, fine-tuning for specific domains, and research.

Feature

GPT-4o

Llama 3.1 405B

Context Window

128k tokens

Real-time Voice

Interactive Code Artifacts

Open Source

API Cost (Input)

$5/1M tokens

$0/1M tokens

API Cost (Output)

$15/1M tokens

$0/1M tokens

Strengths & Weaknesses

GPT-4o

Strengths

•Extremely fast response times
•State-of-the-art multimodal capabilities
•Highly conversational and natural interaction
•Free tier access is very generous

Weaknesses

•Reasoning can sometimes be shallower than GPT-4 Turbo
•Rate limits on the free tier can be restrictive for heavy users

Llama 3.1 405B

Strengths

•Open weights for private deployment
•Comparable performance to GPT-4o
•Huge ecosystem support
•No API dependency (if self-hosted)

Weaknesses

•Requires massive GPU memory to run
•Text-only in base version (no native vision/audio)
•Setup complexity for self-hosting

What Users Are Saying

GPT-4o Users

“Users widely praise GPT-4o for its conversational speed and impressive vision capabilities, though some note it can occasionally be less detailed in reasoning tasks compared to its predecessor, GPT-4 Turbo.”

Llama 3.1 405B Users

“ The open-source community celebrates Llama 3.1 405B as a milestone for democratizing AI. It's powerful but requires significant hardware resources to run locally.”