Omibox

Llama 3.1 405BVSDeepSeek V2.5

Llama 3.1 405B

Llama 3.1 405B

Llama 3.1 405B AI Model

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VS
DeepSeek V2.5

DeepSeek V2.5

DeepSeek V2.5 AI Model

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casual Verdict

Overall, Llama 3.1 405B is the current industry leader (Elo: 1266). It generally provides more accurate and faster responses than [DeepSeek](/lab?model=deepseek/deepseek-chat) V2.5.
Data Verified from Authority Sources

Benchmarks including **LMSYS Chatbot Arena Elo** and **HumanEval Pass@1** are sourced from public leaderboards as of **2025/2026**. These metrics are indicative and may change as models are updated by providers.

LMSYS Leaderboard HumanEval Benchmark

Scores based on normalized benchmarks (0-100 scale)

Feature Comparison

FeatureLlama 3.1 405BDeepSeek V2.5
ProviderMetaDeepSeek
Release Date2024-072024-09
Context Window128000128000
Pricing (Input)0 / Open Source0.14 / per 1M tokens
Pricing (Output)0 / Open Source0.28 / per 1M tokens
Pros
  • Open Weights - can be run privately or fine-tuned
  • Exceptional multi-lingual performance
  • Free to use if self-hosted
  • Insanely cheap API pricing
  • Coding performance rivals Claude 3.5 Sonnet
  • Extremely efficient caching
Cons
  • Requires massive hardware to run locally (405B params)
  • No native vision capabilities (text-only)
  • Weaker in creative writing and English nuance
  • Server stability can be variable

Methodology

We compared Llama 3.1 405B and DeepSeek V2.5 based on real-world usage tests, official technical benchmarks, and community feedback. Our scoring system evaluates speed, reasoning capabilities (MMLU benchmarks), and coding proficiency.

Last updated: 1/17/2026