Llama 3.1 405B
Large
Largest dense Llama. Used as a quality benchmark for open weights, heavy to run, often hosted via Together / DeepInfra / Cerebras.
Llama 3.1 405B is a frontier AI model from Meta. It costs $0.800 per million input tokens and $0.800 per million output tokens (blended $0.800/M), with a 128,000-token context window.
INPUT
$0.800/M
per million input tokens
OUTPUT
$0.800/M
per million output tokens
CONTEXT
128,000
tokens
What it is good at
- Top open-weights quality
- Permissive license
- Strong reasoning
Typical use cases
- Open-weights quality ceiling
- Synthetic data generation
- Distillation source
Benchmarks
vs. best public score
Hand-curated from each provider's published reports and public leaderboards. Methodology varies across sources, treat as directional rather than authoritative.
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Frequently asked questions
How much does Llama 3.1 405B cost?
Llama 3.1 405B costs $0.800 per million input tokens and $0.800 per million output tokens, for a blended reference rate of $0.800 per million tokens.
What is Llama 3.1 405B's context window?
Llama 3.1 405B supports up to 128,000 tokens of context in a single request.
What is Llama 3.1 405B best for?
Llama 3.1 405B is well suited to Top open-weights quality, Permissive license and Strong reasoning.
Who makes Llama 3.1 405B?
Llama 3.1 405B is developed and served by Meta.