Yi Lightning vs FLUX 1.1 Pro Ultra

Compare Yi Lightning 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 Yi Lightning FLUX 1.1 Pro Ultra
CategoryOpen SourceImage
Parameters200B MoE~30B
Context Window128KN/A
Input Price$0.04/1M tokens$0.06/image/1M tokens
Output Price$0.08/1M tokensN/A/1M tokens
Latency~300ms~6s

Choose Yi Lightning when:

  • ✓ High-volume APIs
  • ✓ Fast Q&A
  • ✓ Real-time chatbots
Key Strengths:

Fast inference, Good multilingual, Strong reasoning

Choose FLUX 1.1 Pro Ultra when:

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

Ultra quality, 4K output, Best detail

Verdict: Yi Lightning vs FLUX 1.1 Pro Ultra

For cost efficiency, Yi Lightning wins at $0.04/1M input tokens. For speed, Yi Lightning is faster at ~300ms. Yi Lightning excels at High-volume APIs 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

Yi Lightning costs $0.04/1M input tokens and $0.08/1M output tokens. FLUX 1.1 Pro Ultra costs $0.06/image input and N/A output. Yi Lightning is 1.5x cheaper on input tokens. XALEN offers batch processing at 50% discount on both models.

Performance & Context

Yi Lightning has a 128K context window with ~300ms latency. FLUX 1.1 Pro Ultra offers N/A context at ~6s. Yi Lightning has the larger context window.

Best For

Yi Lightning (Open Source) is optimized for: High-volume APIs, Fast Q&A, Real-time chatbots. 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 Yi Lightning
response_a = client.chat.completions.create(
    model="yi-lightning",
    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, Yi Lightning or FLUX 1.1 Pro Ultra?

Yi Lightning (Open Source, 200B MoE) offers Fast inference. FLUX 1.1 Pro Ultra (Image, ~30B) offers Ultra quality. Choose Yi Lightning for High-volume APIs or FLUX 1.1 Pro Ultra for Print-quality imagery.

How much does Yi Lightning cost vs FLUX 1.1 Pro Ultra?

Yi Lightning: $0.04/1M input, $0.08/1M 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 Yi Lightning 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.