Qwen 3 4B vs SD 3.5 Large

Compare Qwen 3 4B and SD 3.5 Large: 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 Qwen 3 4B SD 3.5 Large
CategoryCompactImage
Parameters4B8B
Context Window128KN/A
Input Price$0.006/1M tokens$0.004/image/1M tokens
Output Price$0.012/1M tokensN/A/1M tokens
Latency~50ms~3s

Choose Qwen 3 4B when:

  • ✓ Mobile apps
  • ✓ Intent detection
  • ✓ Preprocessing
Key Strengths:

Ultra-compact, Mobile-ready, Low cost

Choose SD 3.5 Large when:

  • ✓ Detailed illustrations
  • ✓ Temple artwork
  • ✓ Marketing imagery
Key Strengths:

High quality, Detailed output, Good composition

Verdict: Qwen 3 4B vs SD 3.5 Large

For cost efficiency, SD 3.5 Large wins at $0.004/image/1M input tokens. For speed, SD 3.5 Large is faster at ~3s. Qwen 3 4B excels at Mobile apps while SD 3.5 Large is better for Detailed illustrations. Both are available on XALEN through a single API — try them in the Playground to see which fits your workload.

Detailed Analysis

Pricing Comparison

Qwen 3 4B costs $0.006/1M input tokens and $0.012/1M output tokens. SD 3.5 Large costs $0.004/image input and N/A output. SD 3.5 Large is 1.5x cheaper on input tokens. XALEN offers batch processing at 50% discount on both models.

Performance & Context

Qwen 3 4B has a 128K context window with ~50ms latency. SD 3.5 Large offers N/A context at ~3s. Qwen 3 4B has the larger context window.

Best For

Qwen 3 4B (Compact) is optimized for: Mobile apps, Intent detection, Preprocessing. SD 3.5 Large (Image) works best for: Detailed illustrations, Temple artwork, Marketing imagery.

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 Qwen 3 4B
response_a = client.chat.completions.create(
    model="qwen-3-4b",
    messages=[{"role": "user", "content": "Your question here"}]
)

# Use SD 3.5 Large
response_b = client.chat.completions.create(
    model="stable-diffusion-3-5-large",
    messages=[{"role": "user", "content": "Your question here"}]
)

Start Building with XALEN

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Get API Key Try in Playground

Frequently Asked Questions

Which is better, Qwen 3 4B or SD 3.5 Large?

Qwen 3 4B (Compact, 4B) offers Ultra-compact. SD 3.5 Large (Image, 8B) offers High quality. Choose Qwen 3 4B for Mobile apps or SD 3.5 Large for Detailed illustrations.

How much does Qwen 3 4B cost vs SD 3.5 Large?

Qwen 3 4B: $0.006/1M input, $0.012/1M output. SD 3.5 Large: $0.004/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 Qwen 3 4B and SD 3.5 Large 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.