Llama 3.1 405B vs DeepSeek Coder V2

Compare Llama 3.1 405B and DeepSeek Coder V2: pricing, performance, context window, latency, and best use cases. Side-by-side comparison on XALEN.

Updated 2026-05-21 · By Abhishek Raj · Our methodology

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Feature Llama 3.1 405B DeepSeek Coder V2
CategoryOpen SourceCode
Parameters405B236B (21B active)
Context Window128K128K
Input Price$0.08/1M tokens$0.03/1M tokens
Output Price$0.14/1M tokens$0.06/1M tokens
Latency~600ms~250ms

Choose Llama 3.1 405B when:

  • ✓ Premium tasks
  • ✓ Research
  • ✓ Fine-tuning base
Key Strengths:

Largest open model, Highest open-source quality

Choose DeepSeek Coder V2 when:

  • ✓ System development
  • ✓ API clients
  • ✓ Backend services
Key Strengths:

MoE efficiency, Strong coding, Multiple languages

Verdict: Llama 3.1 405B vs DeepSeek Coder V2

For cost efficiency, DeepSeek Coder V2 wins at $0.03/1M input tokens. For speed, DeepSeek Coder V2 is faster at ~250ms. Llama 3.1 405B excels at Premium tasks while DeepSeek Coder V2 is better for System development. Both are available on XALEN through a single API — try them in the Playground to see which fits your workload.

Detailed Analysis

Pricing Comparison

Llama 3.1 405B costs $0.08/1M input tokens and $0.14/1M output tokens. DeepSeek Coder V2 costs $0.03 input and $0.06 output. DeepSeek Coder V2 is 2.7x cheaper on input tokens. XALEN offers batch processing at 50% discount on both models.

Performance & Context

Llama 3.1 405B has a 128K context window with ~600ms latency. DeepSeek Coder V2 offers 128K context at ~250ms. Both have identical context windows.

Best For

Llama 3.1 405B (Open Source) is optimized for: Premium tasks, Research, Fine-tuning base. DeepSeek Coder V2 (Code) works best for: System development, API clients, Backend services.

Try Both on XALEN

Both models are available through XALEN's OpenAI-compatible API. Switch between them by changing the model parameter:

from xalen import XALEN

client = XALEN(api_key="xln_test_YOUR_KEY")

# Use Llama 3.1 405B
response_a = client.chat.completions.create(
    model="llama-3-1-405b",
    messages=[{"role": "user", "content": "Your question here"}]
)

# Use DeepSeek Coder V2
response_b = client.chat.completions.create(
    model="deepseek-coder-v2",
    messages=[{"role": "user", "content": "Your question here"}]
)

Start Building with XALEN

200+ AI models. One API. Pay-as-you-go.

Get API Key Try in Playground

Frequently Asked Questions

Which is better, Llama 3.1 405B or DeepSeek Coder V2?

Llama 3.1 405B (Open Source, 405B) offers Largest open model. DeepSeek Coder V2 (Code, 236B (21B active)) offers MoE efficiency. Choose Llama 3.1 405B for Premium tasks or DeepSeek Coder V2 for System development.

How much does Llama 3.1 405B cost vs DeepSeek Coder V2?

Llama 3.1 405B: $0.08/1M input, $0.14/1M output. DeepSeek Coder V2: $0.03/1M input, $0.06/1M output. Both available on XALEN with batch processing at 50% discount.

Can I use both models on XALEN?

Yes. XALEN provides 200+ models through a single OpenAI-compatible API. Switch between Llama 3.1 405B and DeepSeek Coder V2 by changing the model parameter. No code changes needed.

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Last updated: 2026-05-21. Pricing and specifications may change. Check pricing page for latest rates.