Llama 3.1 405B vs Stable Image Ultra

Compare Llama 3.1 405B and Stable Image Ultra: 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 Stable Image Ultra
CategoryOpen SourceImage
Parameters405B~12B
Context Window128KN/A
Input Price$0.08/1M tokens$0.008/image/1M tokens
Output Price$0.14/1M tokensN/A/1M tokens
Latency~600ms~4s

Choose Llama 3.1 405B when:

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

Largest open model, Highest open-source quality

Choose Stable Image Ultra when:

  • ✓ Premium photography
  • ✓ Marketing
  • ✓ Product shoots
Key Strengths:

Highest quality, Photorealistic, Professional

Verdict: Llama 3.1 405B vs Stable Image Ultra

For cost efficiency, Stable Image Ultra wins at $0.008/image/1M input tokens. For speed, Stable Image Ultra is faster at ~4s. Llama 3.1 405B excels at Premium tasks while Stable Image Ultra is better for Premium photography. 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. Stable Image Ultra costs $0.008/image input and N/A output. Stable Image Ultra is 10.0x 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. Stable Image Ultra offers N/A context at ~4s. 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. Stable Image Ultra (Image) works best for: Premium photography, Marketing, Product shoots.

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 Stable Image Ultra
response_b = client.chat.completions.create(
    model="stable-image-ultra",
    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 Stable Image Ultra?

Llama 3.1 405B (Open Source, 405B) offers Largest open model. Stable Image Ultra (Image, ~12B) offers Highest quality. Choose Llama 3.1 405B for Premium tasks or Stable Image Ultra for Premium photography.

How much does Llama 3.1 405B cost vs Stable Image Ultra?

Llama 3.1 405B: $0.08/1M input, $0.14/1M output. Stable Image Ultra: $0.008/image/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 Stable Image Ultra 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.