Stable Image Ultra vs MythoMax 13B
Compare Stable Image Ultra 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
| Feature | Stable Image Ultra | MythoMax 13B |
|---|---|---|
| Category | Image | Open Source |
| Parameters | ~12B | 13B |
| Context Window | N/A | 4K |
| Input Price | $0.008/image/1M tokens | $0.01/1M tokens |
| Output Price | N/A/1M tokens | $0.02/1M tokens |
| Latency | ~4s | ~100ms |
Choose Stable Image Ultra when:
- ✓ Premium photography
- ✓ Marketing
- ✓ Product shoots
Highest quality, Photorealistic, Professional
Choose MythoMax 13B when:
- ✓ Story generation
- ✓ Creative content
- ✓ Interactive fiction
Creative writing, Roleplay, Narrative quality
Verdict: Stable Image Ultra vs MythoMax 13B
For cost efficiency, Stable Image Ultra wins at $0.008/image/1M input tokens. For speed, MythoMax 13B is faster at ~100ms. Stable Image Ultra excels at Premium photography 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
Stable Image Ultra costs $0.008/image/1M input tokens and N/A/1M output tokens. MythoMax 13B costs $0.01 input and $0.02 output. Stable Image Ultra is 1.3x cheaper on input tokens. XALEN offers batch processing at 50% discount on both models.
Performance & Context
Stable Image Ultra has a N/A context window with ~4s latency. MythoMax 13B offers 4K context at ~100ms. MythoMax 13B has the larger context window.
Best For
Stable Image Ultra (Image) is optimized for: Premium photography, Marketing, Product shoots. 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 Stable Image Ultra
response_a = client.chat.completions.create(
model="stable-image-ultra",
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"}]
)Frequently Asked Questions
Which is better, Stable Image Ultra or MythoMax 13B?
Stable Image Ultra (Image, ~12B) offers Highest quality. MythoMax 13B (Open Source, 13B) offers Creative writing. Choose Stable Image Ultra for Premium photography or MythoMax 13B for Story generation.
How much does Stable Image Ultra cost vs MythoMax 13B?
Stable Image Ultra: $0.008/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 Stable Image Ultra 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.