MODEL · TEXT
Llama 3.1 405B: frontier open-weight reasoning with 128K-token context.
Meta's largest open-weight model brings a 128K-token context window and full function-calling support to text-focused developer workflows. As an open-weight model, it suits teams that need fine-tuning paths, custom deployment options, or ecosystem flexibility not available from closed-source alternatives. Access Llama 3.1 405B directly inside AresGen without configuring your own inference infrastructure.
Strengths
What Llama 3.1 405B brings to your workflows
- Open-weight architecture gives teams the flexibility to fine-tune on proprietary data, self-host, or integrate into custom pipelines — options that closed-source models do not allow.
- A 128K-token context window handles large codebases, long conversation histories, and multi-document inputs within a single prompt without losing earlier context.
- Function calling support in the instruct variant enables tool-using agents that invoke APIs, query databases, and take structured actions inside AresGen workflows.
- Text-focused, frontier-scale reasoning makes it a practical choice for code generation, analysis, and complex text tasks where open-weight ecosystem control matters.
Available in
Use Llama 3.1 405B inside these AresGen tools
AI Code
Code generation, review, and refactor tasks using a frontier open-weight model with 128K context.
ExploreAI Chat
Multi-turn developer conversations and reasoning sessions with a large text-focused model.
ExploreAI Writer
Long-form text drafting and analysis for teams that prefer an open-weight model in their workflow.
ExploreWhen to pick Llama 3.1 405B over DeepSeek V3
Both are open-weight text models with 128K context and function calling; the decision turns on ecosystem preference and fine-tuning paths — Meta's Llama ecosystem has broader community tooling while DeepSeek V3 is oriented toward cost-efficient general reasoning.
- DeepSeek V3
Prefer DeepSeek V3 when cost-efficient general reasoning is the priority and the DeepSeek ecosystem fits your deployment or fine-tuning workflow.
Frequently asked
What is Llama 3.1 405B's context window?
Does Llama 3.1 405B support function calling?
Does Llama 3.1 405B support vision or image input?
Who makes Llama 3.1 405B?
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Learn moreGet started today.
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