DeepSeek V3 vs Llama 3.1 405B

Side-by-side comparison of pricing, capabilities, benchmarks, and use case fit.

D

DeepSeek V3

DeepSeek

Overall 78

standard

M

Llama 3.1 405B

Meta

Overall 74

slow

Capability radar

Normalized coding, reasoning, writing, vision, context, and value

DeepSeek V3Llama 3.1 405B

Comparison of DeepSeek V3 vs Llama 3.1 405B
Metric	DeepSeek V3	Llama 3.1 405B
Input Price / 1M	$0.27	$0.35
Output Price / 1M	$1.10	$0.70
Combined Price / 1M	$1.37	$1.05
Context Window	64,000	128,000
Coding Score	91	85
Reasoning Score	90	86
Vision Score	45	40
Audio	No	No
Streaming	Yes	Yes
Function Calling	Yes	Yes
Latency Tier	standard	slow
Release Date	12/26/2024	7/23/2024

DeepSeek V3 — Strengths & Weaknesses

Strengths

Exceptional value
Strong coding
MoE efficiency

Weaknesses

64K context
China-based hosting considerations

Llama 3.1 405B — Strengths & Weaknesses

Strengths

Open 405B weights
Strong reasoning

Weaknesses

High inference cost
No multimodal

Use Case Verdicts

Coding

DeepSeek V3 scores 91 vs 85 on coding benchmarks.

General Chat

DeepSeek V3 leads on writing quality (85 vs 83).

Long Context

Llama 3.1 405B offers 128K tokens vs 64K.

Cost Efficiency

Llama 3.1 405B is cheaper at $1.05/M combined vs $1.37/M.

Enterprise Use

DeepSeek V3 combines strong reasoning, tooling, and context for enterprise workloads.

Agent Workflows

DeepSeek V3 is better suited for agentic workflows with tool use and coding capability.