Llama 3.1 405B Instruct
Meta’s largest open-weights instruct checkpoint in the Llama 3.1 family, aimed at strong reasoning and coding quality with a permissive license for research and customization.
Provider
Meta
Model family
Meta Llama
Open weights LLM
Cost tier
405b
Status
Current
Release Jul 23, 2024
Why teams choose it
Serving 405B-class weights requires multi-GPU inference—budget hardware and ops explicitly.
License obligations include acceptable use and attribution—legal review before redistribution.
Tradeoffs to know
- Not a drop-in for tiny edge devices—needs serious infrastructure.
- Safety tooling is operator responsibility when self-hosting.
Technical specs
- Inputs
- text
- Outputs
- text
- Capabilities
- reasoning, coding, fine-tuning
- License
- Llama 3.1 Community License
Benchmarks
- Gpqa
- 51.1
- Mmlu
- 88.6
Meta Llama family lineup
Current models
Related models
Llama 3.1 405B Instruct FAQ
What is Llama 3.1 405B Instruct?
Meta’s largest open-weights instruct checkpoint in the Llama 3.1 family, aimed at strong reasoning and coding quality with a permissive license for research and customization. It is typically served on dedicated GPU clusters or via partners (cloud inference, on-prem) rather than a single vendor API.
When does Llama 3.1 405B Instruct fit best?
Private fine-tunes on proprietary data
What should teams watch out for with Llama 3.1 405B Instruct?
Not a drop-in for tiny edge devices—needs serious infrastructure.
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