Llama 3.1 405B
by Meta
Meta's flagship open-source language model with 405 billion parameters.
Score
Score
Our verdict
Llama 3.1 405B is Meta's most powerful open-source language model, offering advanced capabilities for developers. Released in July 2024, it features 405 billion parameters and a 128K token context window, excelling in tasks requiring extensive context. Available under the Llama 3 Community License, it is accessible through various cloud providers, including AWS Bedrock, GCP Vertex AI, and Replicate API. As of July 1, 2026, Llama 3.1 405B remains a leading choice for developers seeking a robust, open-source language model for complex AI applications.
Overview
Score breakdown
Overall score
Scores are editorial assessments by the Compare Best AI team on a 0–10 scale.
Expert review
CBAI Editorial Team
Compare Best AI · Editorial Team
## Overview
How we tested
Days tested
7 days
Tasks evaluated
- ·Coding tasks
- ·Long-form content generation
- ·Complex reasoning tasks
- ·Multilingual text generation
Method
Compared against OpenAI GPT-4 and Anthropic Claude 3.5 Sonnet using identical inputs
Reviewer
CBAI Editorial Team
Plans & pricing
Free
Individual developers and small projects
- Access to Llama 3.1 405B model
- Community support
AWS Bedrock
Enterprise applications requiring scalable infrastructure
- Managed service
- Scalable deployment
- Integration with AWS ecosystem
GCP Vertex AI
Developers using Google Cloud Platform
- Managed service
- Integration with GCP services
- Scalable deployment
Replicate API
Quick prototyping and experimentation
- API access
- No infrastructure management
- Scalable deployment
Pricing may vary by region. Always verify on the vendor's website.
Feature comparison
| Feature | Llama 3.1 405B | OpenAI GPT-4 | Anthropic Claude 3.5 Sonnet |
|---|---|---|---|
| Core | |||
| Parameter count | |||
| Context window size | |||
| Output | |||
| Multilingual support | |||
| Open-source availability | |||
| Pricing | |||
| Free plan available | |||
| Dev | |||
| Public API | |||
| Integrations | |||
Is it right for you?
Good fit for
Individual Developers
Access to a powerful language model for personal projects.
Enterprise Applications
Scalable deployment through managed services like AWS Bedrock.
Google Cloud Users
Integration with GCP services for seamless deployment.
Less suited for
Cost-Sensitive Projects
Free version may have limitations; paid plans can be costly.
Non-Technical Users
Requires technical expertise to deploy and manage.
User reviews
Editorial score
Distribution is estimated from our editorial score. Verified user reviews coming soon.
Integrations
Reported connectors
Apps and services commonly connected out of the box or via official connectors.
- ["AWS Bedrock","GCP Vertex AI","Replicate API"]
Details
Category
Price
- Free
- AWS Bedrock $1.20/1M tokens
- GCP Vertex AI $1.00/1M tokens
- Replicate API $1.00/1M tokens
Free version
Best for
- Coding and software development
- Long-form content generation
- Complex reasoning tasks
Frequently asked questions
Llama 3.1 405B
Developer
Ready to get started?
Visit the Llama 3.1 405B website to explore plans and start your free trial.
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