GPT-4o vs FLUX 1.1 Pro Ultra

Compare GPT-4o 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 GPT-4o FLUX 1.1 Pro Ultra
CategoryFrontierImage
Parameters~1T~30B
Context Window128KN/A
Input Price$0.05/1M tokens$0.06/image/1M tokens
Output Price$0.15/1M tokensN/A/1M tokens
Latency~400ms~6s

Choose GPT-4o when:

  • ✓ Chart image analysis
  • ✓ Multimodal Q&A
  • ✓ Content generation
Key Strengths:

Multimodal, Fast for frontier, 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: GPT-4o vs FLUX 1.1 Pro Ultra

For cost efficiency, GPT-4o wins at $0.05/1M input tokens. For speed, GPT-4o is faster at ~400ms. GPT-4o excels at Chart image analysis 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

GPT-4o costs $0.05/1M input tokens and $0.15/1M output tokens. FLUX 1.1 Pro Ultra costs $0.06/image input and N/A output. GPT-4o is 1.2x cheaper on input tokens. XALEN offers batch processing at 50% discount on both models.

Performance & Context

GPT-4o has a 128K context window with ~400ms latency. FLUX 1.1 Pro Ultra offers N/A context at ~6s. GPT-4o has the larger context window.

Best For

GPT-4o (Frontier) is optimized for: Chart image analysis, Multimodal Q&A, Content generation. 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 GPT-4o
response_a = client.chat.completions.create(
    model="gpt-4o",
    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, GPT-4o or FLUX 1.1 Pro Ultra?

GPT-4o (Frontier, ~1T) offers Multimodal. FLUX 1.1 Pro Ultra (Image, ~30B) offers Ultra quality. Choose GPT-4o for Chart image analysis or FLUX 1.1 Pro Ultra for Print-quality imagery.

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

GPT-4o: $0.05/1M input, $0.15/1M 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 GPT-4o 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.