Inflection 3 Pi vs Stable Image Ultra

Compare Inflection 3 Pi 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 Inflection 3 Pi Stable Image Ultra
CategoryCompactImage
Parameters~40B~12B
Context Window128KN/A
Input Price$0.02/1M tokens$0.008/image/1M tokens
Output Price$0.04/1M tokensN/A/1M tokens
Latency~150ms~4s

Choose Inflection 3 Pi when:

  • ✓ Personal assistants
  • ✓ Chat companions
  • ✓ Support bots
Key Strengths:

Conversational, Empathetic, Fast

Choose Stable Image Ultra when:

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

Highest quality, Photorealistic, Professional

Verdict: Inflection 3 Pi vs Stable Image Ultra

For cost efficiency, Stable Image Ultra wins at $0.008/image/1M input tokens. For speed, Inflection 3 Pi is faster at ~150ms. Inflection 3 Pi excels at Personal assistants 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

Inflection 3 Pi costs $0.02/1M input tokens and $0.04/1M output tokens. Stable Image Ultra costs $0.008/image input and N/A output. Stable Image Ultra is 2.5x cheaper on input tokens. XALEN offers batch processing at 50% discount on both models.

Performance & Context

Inflection 3 Pi has a 128K context window with ~150ms latency. Stable Image Ultra offers N/A context at ~4s. Inflection 3 Pi has the larger context window.

Best For

Inflection 3 Pi (Compact) is optimized for: Personal assistants, Chat companions, Support bots. 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 Inflection 3 Pi
response_a = client.chat.completions.create(
    model="inflection-3-pi",
    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"}]
)

Start Building with XALEN

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Get API Key Try in Playground

Frequently Asked Questions

Which is better, Inflection 3 Pi or Stable Image Ultra?

Inflection 3 Pi (Compact, ~40B) offers Conversational. Stable Image Ultra (Image, ~12B) offers Highest quality. Choose Inflection 3 Pi for Personal assistants or Stable Image Ultra for Premium photography.

How much does Inflection 3 Pi cost vs Stable Image Ultra?

Inflection 3 Pi: $0.02/1M input, $0.04/1M 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 Inflection 3 Pi 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.