Llama 3.1 405B vs DeepSeek-V4
Head-to-head technical comparison of intelligence, capabilities, and API pricing.
Llama 3.1 405B
Meta
AI Mastery Index85
LMSYS Arena1255
Technical (MMLU-Pro)88.6%
Cost per 1M Tokens$0
DeepSeek-V4
DeepSeek
AI Mastery Index91.8
LMSYS Arena1290
Technical (MMLU-Pro)91.8%
Cost per 1M Tokens$0.14
Architect's Verdict
When comparing Llama 3.1 405B and DeepSeek-V4, DeepSeek-V4 edges out in overall capabilities according to the AI Mastery Index. However, for cost-sensitive workloads, Llama 3.1 405B offers a more economical API at $0 per 1M tokens. Your choice should depend heavily on whether you prioritize raw reasoning (MMLU) or scalable deployment economics.