DeepSeek R1 0528 vs Gemini 2.5 Pro Preview
Compare DeepSeek R1 0528 and Gemini 2.5 Pro Preview: 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 | DeepSeek R1 0528 | Gemini 2.5 Pro Preview |
|---|---|---|
| Category | Reasoning | Frontier |
| Parameters | 671B | ~1.5T |
| Context Window | 128K | 2M |
| Input Price | $0.08/1M tokens | $0.07/1M tokens |
| Output Price | $0.15/1M tokens | $0.21/1M tokens |
| Latency | ~800ms | ~700ms |
Choose DeepSeek R1 0528 when:
- ✓ Calculation verification
- ✓ Classical text analysis
- ✓ Quality-critical
Improved accuracy, Reduced hallucination, Strong math
Choose Gemini 2.5 Pro Preview when:
- ✓ Research
- ✓ Long analysis
- ✓ Testing new capabilities
2M context, Experimental features, Strong reasoning
Verdict: DeepSeek R1 0528 vs Gemini 2.5 Pro Preview
For cost efficiency, Gemini 2.5 Pro Preview wins at $0.07/1M input tokens. For speed, Gemini 2.5 Pro Preview is faster at ~700ms. DeepSeek R1 0528 excels at Calculation verification while Gemini 2.5 Pro Preview is better for Research. Both are available on XALEN through a single API — try them in the Playground to see which fits your workload.
Detailed Analysis
Pricing Comparison
DeepSeek R1 0528 costs $0.08/1M input tokens and $0.15/1M output tokens. Gemini 2.5 Pro Preview costs $0.07 input and $0.21 output. Gemini 2.5 Pro Preview is 1.1x cheaper on input tokens. XALEN offers batch processing at 50% discount on both models.
Performance & Context
DeepSeek R1 0528 has a 128K context window with ~800ms latency. Gemini 2.5 Pro Preview offers 2M context at ~700ms. Gemini 2.5 Pro Preview has the larger context window.
Best For
DeepSeek R1 0528 (Reasoning) is optimized for: Calculation verification, Classical text analysis, Quality-critical. Gemini 2.5 Pro Preview (Frontier) works best for: Research, Long analysis, Testing new capabilities.
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 DeepSeek R1 0528
response_a = client.chat.completions.create(
model="deepseek-r1-0528",
messages=[{"role": "user", "content": "Your question here"}]
)
# Use Gemini 2.5 Pro Preview
response_b = client.chat.completions.create(
model="gemini-2-5-pro-preview",
messages=[{"role": "user", "content": "Your question here"}]
)Frequently Asked Questions
Which is better, DeepSeek R1 0528 or Gemini 2.5 Pro Preview?
DeepSeek R1 0528 (Reasoning, 671B) offers Improved accuracy. Gemini 2.5 Pro Preview (Frontier, ~1.5T) offers 2M context. Choose DeepSeek R1 0528 for Calculation verification or Gemini 2.5 Pro Preview for Research.
How much does DeepSeek R1 0528 cost vs Gemini 2.5 Pro Preview?
DeepSeek R1 0528: $0.08/1M input, $0.15/1M output. Gemini 2.5 Pro Preview: $0.07/1M input, $0.21/1M 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 DeepSeek R1 0528 and Gemini 2.5 Pro Preview 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.