Claude Opus 4.5 vs FLUX 1.1 Pro
Compare Claude Opus 4.5 and FLUX 1.1 Pro: 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 | Claude Opus 4.5 | FLUX 1.1 Pro |
|---|---|---|
| Category | Frontier | Image |
| Parameters | ~2.5T | 24B |
| Context Window | 200K | N/A |
| Input Price | $0.15/1M tokens | $0.05/image/1M tokens |
| Output Price | $0.75/1M tokens | N/A/1M tokens |
| Latency | ~900ms | ~4s |
Choose Claude Opus 4.5 when:
- ✓ Creative writing
- ✓ Complex analysis
- ✓ Research
Superior creativity, Nuanced reasoning, Complex analysis
Choose FLUX 1.1 Pro when:
- ✓ Premium marketing
- ✓ Temple artwork
- ✓ Product photography
Highest quality, Best prompt adherence, Professional grade
Verdict: Claude Opus 4.5 vs FLUX 1.1 Pro
For cost efficiency, FLUX 1.1 Pro wins at $0.05/image/1M input tokens. For speed, FLUX 1.1 Pro is faster at ~4s. Claude Opus 4.5 excels at Creative writing while FLUX 1.1 Pro is better for Premium marketing. Both are available on XALEN through a single API — try them in the Playground to see which fits your workload.
Detailed Analysis
Pricing Comparison
Claude Opus 4.5 costs $0.15/1M input tokens and $0.75/1M output tokens. FLUX 1.1 Pro costs $0.05/image input and N/A output. FLUX 1.1 Pro is 3.0x cheaper on input tokens. XALEN offers batch processing at 50% discount on both models.
Performance & Context
Claude Opus 4.5 has a 200K context window with ~900ms latency. FLUX 1.1 Pro offers N/A context at ~4s. Claude Opus 4.5 has the larger context window.
Best For
Claude Opus 4.5 (Frontier) is optimized for: Creative writing, Complex analysis, Research. FLUX 1.1 Pro (Image) works best for: Premium marketing, Temple artwork, Product photography.
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 Claude Opus 4.5
response_a = client.chat.completions.create(
model="claude-opus-4-5",
messages=[{"role": "user", "content": "Your question here"}]
)
# Use FLUX 1.1 Pro
response_b = client.chat.completions.create(
model="flux-1-1-pro",
messages=[{"role": "user", "content": "Your question here"}]
)Frequently Asked Questions
Which is better, Claude Opus 4.5 or FLUX 1.1 Pro?
Claude Opus 4.5 (Frontier, ~2.5T) offers Superior creativity. FLUX 1.1 Pro (Image, 24B) offers Highest quality. Choose Claude Opus 4.5 for Creative writing or FLUX 1.1 Pro for Premium marketing.
How much does Claude Opus 4.5 cost vs FLUX 1.1 Pro?
Claude Opus 4.5: $0.15/1M input, $0.75/1M output. FLUX 1.1 Pro: $0.05/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 Claude Opus 4.5 and FLUX 1.1 Pro 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.