Identity
- Status
- active
- Developer ID
meta-llama/Llama-3.1-405B-Instruct- Released
- Jul 23, 2024
- Version
- Llama-3.1-405B-Instruct
- License
- llama3.1
MetaLlama 3.1 405B Instruct
Llama-3.1-405B-Instruct is an open-weight language model published by Meta.
- Token context
- 131K tokens
- Inputs
- Text
- Outputs
- Text
- Released
- Jul 23, 2024
Providers & Pricing
1 current hosted offerings
No Directly Sourced Provider Price Yet
API pricing is provider-specific and stays unknown until a serving provider publishes an exact offering for this model version.
At a Glance
Model Facts
Capacity
- Token context
- 131K tokens
- Maximum output
- Unknown
- Total parameters
- 405.9B
- Active parameters
- Unknown
- Knowledge cutoff
- Not reported
Interface and Access
- Inputs
- Text
- Outputs
- Text
- API available
- Yes
- Open weights
- Yes
- Self-hostable
- Yes
- Reasoning
- No
- Vision
- No
- Tool calling
- Yes
- Capabilities
- chat, generation, tools
This page represents one developer model product. Dated API snapshots, serving endpoints, pricing, regions, quantizations, and service tiers attach as versioned aliases or provider details and never create duplicate public model records.
Version Lineage
PredecessorUnknown
SuccessorsUnknown
Aliasesmeta-llama/Llama-3.1-405B-Instruct, meta-llama/Llama-3.1-405B-Instruct
Explicit Unknowns
- Maximum output
- Knowledge cutoff
- Provider pricing
Primary Evidence
Sources and Observation Date
meta-llama/Llama-3.1-405B-Instruct developer model repositoryMeta · observed Aug 28, 2026meta-llama/Llama-3.1-405B-Instruct immutable Hub API metadataMeta · observed Aug 28, 2026meta-llama/Llama-3.1-405B-Instruct README.md at be673f326cabMeta · observed Aug 28, 2026Hugging Face catalogHugging Face · observed Sep 2, 2026Together Ai catalogTogether Ai · observed Oct 19, 2026
Comparable Peers
Related Model Comparisons
| A | Pair | B | Context |
|---|---|---|---|
| vs |  DeepSeek R1DeepSeek | cross-developer peerstext | |
| vs | DeepSeek V3DeepSeek | cross-developer peerstext | |
| vs | DeepSeek V3.2DeepSeek | cross-developer peerstext | |
| vs | Llama 3.1 405BMeta | family variantstext | |
| vs | family variantstext | ||
| vs | family variantstext | ||
| vs | family variantstext | ||
| vs |  MiniMax M2.5MiniMax | cross-developer peerstext | |
| vs | MiniMax M2.7MiniMax | cross-developer peerstext | |
| vs |  Kimi K2 InstructMoonshot AI | cross-developer peerstext | |
| vs | cross-developer peerstext | ||
| vs |  Hy3Tencent | cross-developer peerstext |
Questions
Llama 3.1 405B Instruct FAQs
What is Llama 3.1 405B Instruct?+
Llama-3.1-405B-Instruct is an open-weight language model published by Meta. It is developed by Meta and its current sourced lifecycle status is active.
What inputs and outputs does Llama 3.1 405B Instruct support?+
Llama 3.1 405B Instruct's current record lists Text as input and Text as output.
How much context does Llama 3.1 405B Instruct support?+
The current record lists a 131K-token context window and does not report a maximum output length.
Is Llama 3.1 405B Instruct available through an API?+
Llama 3.1 405B Instruct is marked as API-available. The directly sourced provider records currently include Together Ai.
How large is Llama 3.1 405B Instruct?+
The current record lists 405.9B total parameters and an unknown active parameter count. Its architecture is LlamaForCausalLM.
What capabilities and tasks does Llama 3.1 405B Instruct support?+
Llama 3.1 405B Instruct's recorded capabilities are chat, generation, and tools. Its supported tasks are text.
How much does Llama 3.1 405B Instruct cost through an API?+
No directly sourced token price is currently attached to Llama 3.1 405B Instruct. Missing prices remain unknown rather than being inferred from another model or provider.
Can Llama 3.1 405B Instruct be self-hosted?+
Llama 3.1 405B Instruct is an open-weight model. Self-hosting is supported, and the recorded license is llama3.1.
Does Llama 3.1 405B Instruct have related versions or aliases?+
No predecessor is recorded. No successor is recorded. Recorded aliases are meta-llama/Llama-3.1-405B-Instruct.
Which models can Llama 3.1 405B Instruct be compared with?+
The current compatible peer set includes DeepSeek R1, DeepSeek V3, DeepSeek V3.2, Llama 3.1 405B, and Llama 3.1 70B Instruct. Compatibility requires shared sourced modalities and tasks; it does not imply that one model is better. Browse model comparisons →