Meta: Llama 3.1 405B (base)

MetaID: meta-llama/llama-3.1-405b

Meta's latest class of model (Llama 3.1) launched with a variety of sizes & flavors. This is the base 405B pre-trained version. It has demonstrated strong performance compared to leading closed-source models in human evaluations. To read more about the model release, [click here](https://ai.meta.com/blog/meta-llama-3/). Usage of this model is subject to [Meta's Acceptable Use Policy](https://llama.meta.com/llama3/use-policy/).

Pricing per 1M Tokens

Input (Prompt)$4.00
Output (Completion)$4.00
Cache ReadFree
Cache WriteFree
ImageN/A

Specifications

Context Length33K
Max Output Tokens33K
Input ModalitiesText
Output ModalitiesText
TokenizerLlama3
Instruct Typenone
Top Provider Context33K
Top Provider Max Output33K
ModeratedNo

Compare this model

See how Meta: Llama 3.1 405B (base) stacks up against other models.

vs Meta: Llama Guard 4 12Bvs Meta: Llama 4 Maverickvs Meta: Llama 4 Scoutvs Llama Guard 3 8Bvs Meta: Llama 3.3 70B Instruct (free)

More from Meta

Meta: Llama Guard 4 12B
Input$0.18
Context164K
Meta: Llama 4 Maverick
Input$0.15
Context1.0M
Meta: Llama 4 Scout
Input$0.08
Context328K
Llama Guard 3 8B
Input$0.02
Context131K
Meta: Llama 3.3 70B Instruct (free)
InputFree
Context66K

Last updated: March 23, 2026

First tracked: March 23, 2026