Claude Opus 4.5 vs Arctic Large
Compare Claude Opus 4.5 and Arctic Large: 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 | Arctic Large |
|---|---|---|
| Category | Frontier | Enterprise |
| Parameters | ~2.5T | 480B (17B active) |
| Context Window | 200K | 128K |
| Input Price | $0.15/1M tokens | $0.06/1M tokens |
| Output Price | $0.75/1M tokens | $0.10/1M tokens |
| Latency | ~900ms | ~400ms |
Choose Claude Opus 4.5 when:
- ✓ Creative writing
- ✓ Complex analysis
- ✓ Research
Superior creativity, Nuanced reasoning, Complex analysis
Choose Arctic Large when:
- ✓ Data analysis
- ✓ SQL generation
- ✓ Business intelligence
Strong SQL, Data analysis, Enterprise features
Verdict: Claude Opus 4.5 vs Arctic Large
For cost efficiency, Arctic Large wins at $0.06/1M input tokens. For speed, Arctic Large is faster at ~400ms. Claude Opus 4.5 excels at Creative writing while Arctic Large is better for Data analysis. 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. Arctic Large costs $0.06 input and $0.10 output. Arctic Large is 2.5x 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. Arctic Large offers 128K context at ~400ms. Claude Opus 4.5 has the larger context window.
Best For
Claude Opus 4.5 (Frontier) is optimized for: Creative writing, Complex analysis, Research. Arctic Large (Enterprise) works best for: Data analysis, SQL generation, Business intelligence.
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 Arctic Large
response_b = client.chat.completions.create(
model="arctic-large",
messages=[{"role": "user", "content": "Your question here"}]
)Frequently Asked Questions
Which is better, Claude Opus 4.5 or Arctic Large?
Claude Opus 4.5 (Frontier, ~2.5T) offers Superior creativity. Arctic Large (Enterprise, 480B (17B active)) offers Strong SQL. Choose Claude Opus 4.5 for Creative writing or Arctic Large for Data analysis.
How much does Claude Opus 4.5 cost vs Arctic Large?
Claude Opus 4.5: $0.15/1M input, $0.75/1M output. Arctic Large: $0.06/1M input, $0.10/1M 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 Arctic Large 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.