Llama 3.1 405B vs You.com Smart

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

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

All Meta models All You.com models What is an LLM API? Python Quickstart What is inference?
Feature Llama 3.1 405B You.com Smart
CategoryOpen SourceSearch
Parameters405B~200B
Context Window128K128K
Input Price$0.08/1M tokens$0.05/1M tokens
Output Price$0.14/1M tokens$0.10/1M tokens
Latency~600ms~500ms

Choose Llama 3.1 405B when:

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

Largest open model, Highest open-source quality

Choose You.com Smart when:

  • ✓ Search-augmented Q&A
  • ✓ Current events
  • ✓ Research
Key Strengths:

Real-time web search, Grounded answers, Citations

Verdict: Llama 3.1 405B vs You.com Smart

For cost efficiency, You.com Smart wins at $0.05/1M input tokens. For speed, You.com Smart is faster at ~500ms. Llama 3.1 405B excels at Premium tasks while You.com Smart is better for Search-augmented Q&A. 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. You.com Smart costs $0.05 input and $0.10 output. You.com Smart is 1.6x 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. You.com Smart offers 128K context at ~500ms. Both have identical context windows.

Best For

Llama 3.1 405B (Open Source) is optimized for: Premium tasks, Research, Fine-tuning base. You.com Smart (Search) works best for: Search-augmented Q&A, Current events, Research.

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 You.com Smart
response_b = client.chat.completions.create(
    model="you-com-smart",
    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 You.com Smart?

Llama 3.1 405B (Open Source, 405B) offers Largest open model. You.com Smart (Search, ~200B) offers Real-time web search. Choose Llama 3.1 405B for Premium tasks or You.com Smart for Search-augmented Q&A.

How much does Llama 3.1 405B cost vs You.com Smart?

Llama 3.1 405B: $0.08/1M input, $0.14/1M output. You.com Smart: $0.05/1M input, $0.10/1M 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 You.com Smart 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.