Llama 3.1 405B Review 2026
MetaLarge Language Model2024-074.5/5
Overview
Meta's largest open-source model with 405 billion parameters, rivaling proprietary models on benchmarks. Available for self-hosting and commercial use, making it a cornerstone of the open-source AI ecosystem.
ProviderMeta
Context Window128K tokens
PricingFree (self-hosted) / $0.50-$3 per 1M tokens (hosted)
Capabilities
- ✓ Text generation
- ✓ Code generation
- ✓ Multilingual support
- ✓ Tool use
- ✓ Mathematical reasoning
- ✓ Long-context processing
Pricing
Free (self-hosted) / $0.50-$3 per 1M tokens (hosted)
Pros & Cons
Pros
- +Fully open-source with permissive commercial license
- +Performance competitive with top proprietary models
- +Can be self-hosted for complete data privacy
- +Large community with extensive fine-tuning ecosystem
Cons
- -Requires significant GPU resources to self-host the full model
- -Hosted API pricing varies widely across providers
- -Less refined safety tuning compared to proprietary alternatives
Frequently Asked Questions
What is Llama 3.1 405B?▾
Meta's largest open-source model with 405 billion parameters, rivaling proprietary models on benchmarks. Available for self-hosting and commercial use, making it a cornerstone of the open-source AI ecosystem.
How much does Llama 3.1 405B cost?▾
Llama 3.1 405B pricing: Free (self-hosted) / $0.50-$3 per 1M tokens (hosted)
What is the context window for Llama 3.1 405B?▾
Llama 3.1 405B supports a context window of 128K tokens.
When was Llama 3.1 405B released?▾
Llama 3.1 405B was released on 2024-07 by Meta.