Llama 3.1 405B Instruct
The world's largest publicly available LLM, matching the frontier performance of GPT-4o.
Context window
128,000 tokens
Max output
4,096 tokens
Input price
No official price captured yet
Output price
No official price captured yet
Modalities
Input: Text; output: Text
API surface
1 supported endpoint
Overview
Where this model fits best
Use this section to quickly decide whether the model belongs in chat, coding, reasoning, embedding, rerank, vision, audio, or agent workflows.
Use cases
What this model should be considered for
Best fit
Use this model when you need a well-documented, structured option inside the registry and want a single place to inspect pricing, capabilities, and operational limits.
Capabilities
What you can actually do with it
Feature flags, API endpoints, and tool support are separated so integration constraints are easy to scan.
Capabilities
High-level features exposed by the model runtime.
Endpoints
APIs and surfaces this model can be called through.
Pricing
Pricing and billing signals
Known prices are shown per 1M tokens. Missing official prices are marked as not published instead of being treated as free.
No official pricing has been captured for this model yet. ModelMeta keeps unknown pricing separate from free pricing, so missing data is not shown as $0.
Check official pricing sourceControls
Runtime knobs worth knowing
Supported request parameters help developers understand sampling, output limits, reasoning controls, and structured output behavior.
Temperature
0 to 2
Top P
0 to 1
Presence Penalty
-2 to 2
Frequency Penalty
-2 to 2
Response Format
text, json_object
Specifications
Technical reference
Canonical identifiers, family, modalities, token limits, training information, and update metadata.
Model ID
llama-3.1-405b-instructUse this exact identifier in API calls and SDK configuration.
Provider
Family
Access type
Input modalities
Output modalities
Max output tokens