Llama 3.1 405B vs Udio v2

Compare Llama 3.1 405B and Udio 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 Udio v2
CategoryOpen SourceAudio
Parameters405B~5B
Context Window128KN/A
Input Price$0.08/1M tokens$0.04/song/1M tokens
Output Price$0.14/1M tokensN/A/1M tokens
Latency~600ms~25s

Choose Llama 3.1 405B when:

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

Largest open model, Highest open-source quality

Choose Udio v2 when:

  • ✓ Music creation
  • ✓ Jingles
  • ✓ Devotional music
Key Strengths:

High-quality vocals, Genre variety, Lyric integration

Verdict: Llama 3.1 405B vs Udio v2

For cost efficiency, Udio v2 wins at $0.04/song/1M input tokens. For speed, Udio v2 is faster at ~25s. Llama 3.1 405B excels at Premium tasks while Udio v2 is better for Music creation. 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. Udio v2 costs $0.04/song input and N/A output. Udio v2 is 2.0x 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. Udio v2 offers N/A context at ~25s. Llama 3.1 405B has the larger context window.

Best For

Llama 3.1 405B (Open Source) is optimized for: Premium tasks, Research, Fine-tuning base. Udio v2 (Audio) works best for: Music creation, Jingles, Devotional music.

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 Udio v2
response_b = client.chat.completions.create(
    model="udio-v2",
    messages=[{"role": "user", "content": "Your question here"}]
)

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Get API Key Try in Playground

Frequently Asked Questions

Which is better, Llama 3.1 405B or Udio v2?

Llama 3.1 405B (Open Source, 405B) offers Largest open model. Udio v2 (Audio, ~5B) offers High-quality vocals. Choose Llama 3.1 405B for Premium tasks or Udio v2 for Music creation.

How much does Llama 3.1 405B cost vs Udio v2?

Llama 3.1 405B: $0.08/1M input, $0.14/1M output. Udio v2: $0.04/song/1M input, N/A/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 Udio 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.