SD 3.5 Medium vs MythoMax 13B

Compare SD 3.5 Medium and MythoMax 13B: 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 SD 3.5 Medium MythoMax 13B
CategoryImageOpen Source
Parameters2.5B13B
Context WindowN/A4K
Input Price$0.003/image/1M tokens$0.01/1M tokens
Output PriceN/A/1M tokens$0.02/1M tokens
Latency~2s~100ms

Choose SD 3.5 Medium when:

  • ✓ General imagery
  • ✓ Batch generation
  • ✓ Prototyping
Key Strengths:

Good quality, Fast, Open weights

Choose MythoMax 13B when:

  • ✓ Story generation
  • ✓ Creative content
  • ✓ Interactive fiction
Key Strengths:

Creative writing, Roleplay, Narrative quality

Verdict: SD 3.5 Medium vs MythoMax 13B

For cost efficiency, SD 3.5 Medium wins at $0.003/image/1M input tokens. For speed, MythoMax 13B is faster at ~100ms. SD 3.5 Medium excels at General imagery while MythoMax 13B is better for Story generation. Both are available on XALEN through a single API — try them in the Playground to see which fits your workload.

Detailed Analysis

Pricing Comparison

SD 3.5 Medium costs $0.003/image/1M input tokens and N/A/1M output tokens. MythoMax 13B costs $0.01 input and $0.02 output. SD 3.5 Medium is 3.3x cheaper on input tokens. XALEN offers batch processing at 50% discount on both models.

Performance & Context

SD 3.5 Medium has a N/A context window with ~2s latency. MythoMax 13B offers 4K context at ~100ms. MythoMax 13B has the larger context window.

Best For

SD 3.5 Medium (Image) is optimized for: General imagery, Batch generation, Prototyping. MythoMax 13B (Open Source) works best for: Story generation, Creative content, Interactive fiction.

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 SD 3.5 Medium
response_a = client.chat.completions.create(
    model="stable-diffusion-3-5-medium",
    messages=[{"role": "user", "content": "Your question here"}]
)

# Use MythoMax 13B
response_b = client.chat.completions.create(
    model="mythomax-13b",
    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, SD 3.5 Medium or MythoMax 13B?

SD 3.5 Medium (Image, 2.5B) offers Good quality. MythoMax 13B (Open Source, 13B) offers Creative writing. Choose SD 3.5 Medium for General imagery or MythoMax 13B for Story generation.

How much does SD 3.5 Medium cost vs MythoMax 13B?

SD 3.5 Medium: $0.003/image/1M input, N/A/1M output. MythoMax 13B: $0.01/1M input, $0.02/1M 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 SD 3.5 Medium and MythoMax 13B 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.