Phi-4 vs FLUX 1.1 Pro Ultra

Compare Phi-4 and FLUX 1.1 Pro 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 Phi-4 FLUX 1.1 Pro Ultra
CategoryCompactImage
Parameters14B~30B
Context Window16KN/A
Input Price$0.01/1M tokens$0.06/image/1M tokens
Output Price$0.02/1M tokensN/A/1M tokens
Latency~100ms~6s

Choose Phi-4 when:

  • ✓ Edge deployments
  • ✓ Cost-sensitive apps
  • ✓ Classification
Key Strengths:

Very compact, Strong reasoning for size, Extremely low cost

Choose FLUX 1.1 Pro Ultra when:

  • ✓ Print-quality imagery
  • ✓ Ultra-HD content
  • ✓ Professional art
Key Strengths:

Ultra quality, 4K output, Best detail

Verdict: Phi-4 vs FLUX 1.1 Pro Ultra

For cost efficiency, Phi-4 wins at $0.01/1M input tokens. For speed, Phi-4 is faster at ~100ms. Phi-4 excels at Edge deployments while FLUX 1.1 Pro Ultra is better for Print-quality imagery. Both are available on XALEN through a single API — try them in the Playground to see which fits your workload.

Detailed Analysis

Pricing Comparison

Phi-4 costs $0.01/1M input tokens and $0.02/1M output tokens. FLUX 1.1 Pro Ultra costs $0.06/image input and N/A output. Phi-4 is 6.0x cheaper on input tokens. XALEN offers batch processing at 50% discount on both models.

Performance & Context

Phi-4 has a 16K context window with ~100ms latency. FLUX 1.1 Pro Ultra offers N/A context at ~6s. Phi-4 has the larger context window.

Best For

Phi-4 (Compact) is optimized for: Edge deployments, Cost-sensitive apps, Classification. FLUX 1.1 Pro Ultra (Image) works best for: Print-quality imagery, Ultra-HD content, Professional art.

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 Phi-4
response_a = client.chat.completions.create(
    model="phi-4",
    messages=[{"role": "user", "content": "Your question here"}]
)

# Use FLUX 1.1 Pro Ultra
response_b = client.chat.completions.create(
    model="flux-1-1-pro-ultra",
    messages=[{"role": "user", "content": "Your question here"}]
)

Start Building with XALEN

200+ AI models. One API. Pay-as-you-go.

Get API Key Try in Playground

Frequently Asked Questions

Which is better, Phi-4 or FLUX 1.1 Pro Ultra?

Phi-4 (Compact, 14B) offers Very compact. FLUX 1.1 Pro Ultra (Image, ~30B) offers Ultra quality. Choose Phi-4 for Edge deployments or FLUX 1.1 Pro Ultra for Print-quality imagery.

How much does Phi-4 cost vs FLUX 1.1 Pro Ultra?

Phi-4: $0.01/1M input, $0.02/1M output. FLUX 1.1 Pro Ultra: $0.06/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 Phi-4 and FLUX 1.1 Pro 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.