Claude Opus 4.5 vs DeepSeek R1 0528

Compare Claude Opus 4.5 and DeepSeek R1 0528: 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 Claude Opus 4.5 DeepSeek R1 0528
CategoryFrontierReasoning
Parameters~2.5T671B
Context Window200K128K
Input Price$0.15/1M tokens$0.08/1M tokens
Output Price$0.75/1M tokens$0.15/1M tokens
Latency~900ms~800ms

Choose Claude Opus 4.5 when:

  • ✓ Creative writing
  • ✓ Complex analysis
  • ✓ Research
Key Strengths:

Superior creativity, Nuanced reasoning, Complex analysis

Choose DeepSeek R1 0528 when:

  • ✓ Calculation verification
  • ✓ Classical text analysis
  • ✓ Quality-critical
Key Strengths:

Improved accuracy, Reduced hallucination, Strong math

Verdict: Claude Opus 4.5 vs DeepSeek R1 0528

For cost efficiency, DeepSeek R1 0528 wins at $0.08/1M input tokens. For speed, DeepSeek R1 0528 is faster at ~800ms. Claude Opus 4.5 excels at Creative writing while DeepSeek R1 0528 is better for Calculation verification. 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. DeepSeek R1 0528 costs $0.08 input and $0.15 output. DeepSeek R1 0528 is 1.9x 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. DeepSeek R1 0528 offers 128K context at ~800ms. Claude Opus 4.5 has the larger context window.

Best For

Claude Opus 4.5 (Frontier) is optimized for: Creative writing, Complex analysis, Research. DeepSeek R1 0528 (Reasoning) works best for: Calculation verification, Classical text analysis, Quality-critical.

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 DeepSeek R1 0528
response_b = client.chat.completions.create(
    model="deepseek-r1-0528",
    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, Claude Opus 4.5 or DeepSeek R1 0528?

Claude Opus 4.5 (Frontier, ~2.5T) offers Superior creativity. DeepSeek R1 0528 (Reasoning, 671B) offers Improved accuracy. Choose Claude Opus 4.5 for Creative writing or DeepSeek R1 0528 for Calculation verification.

How much does Claude Opus 4.5 cost vs DeepSeek R1 0528?

Claude Opus 4.5: $0.15/1M input, $0.75/1M output. DeepSeek R1 0528: $0.08/1M input, $0.15/1M 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 DeepSeek R1 0528 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.