Llama 4 405B — reviews, specs & pricing

Meta's biggest open-weights model. Strong general reasoning; self-host or via inference providers.

Summary

Llama 4 405B represents Meta's frontier-class open-weights model, offering state-of-the-art general reasoning, coding, and chat capabilities. Designed to compete directly with leading proprietary models, it provides enterprises with the flexibility of local deployment or cloud-based API access. Its massive scale makes it a premier choice for complex, high-security AI workloads that require full model ownership.

Sample use case

An enterprise software development firm integrates Llama 4 405B into their secure on-premise infrastructure to automate code generation, conduct deep vulnerability audits, and generate internal technical documentation. Because they handle highly sensitive proprietary client codebases, using an open-weights model of this scale allows them to keep all data within their private cloud while achieving performance comparable to closed proprietary APIs.

Specifications

• Provider: meta
• License: open
• Parameters: 405B
• Context: 128k tokens

Pros

• State-of-the-art reasoning and coding capabilities
• Complete control over deployment and data privacy
• Cost-effective scaling via self-hosting or API providers
• Massive context window and knowledge base

Cons

• Extremely demanding hardware requirements for local hosting
• High operational latency compared to smaller optimized models
• Complex setup and fine-tuning overhead

Average rating 0.0 from 0 community reviews on Reviuws.