o3 Mini vs DeepSeek R1 0528

Compare o3 Mini 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

All OpenAI models All DeepSeek models What is an LLM API? Python Quickstart What is inference?
Feature o3 Mini DeepSeek R1 0528
CategoryReasoningReasoning
Parameters~200B671B
Context Window200K128K
Input Price$0.04/1M tokens$0.08/1M tokens
Output Price$0.16/1M tokens$0.15/1M tokens
Latency~1000ms~800ms

Choose o3 Mini when:

  • ✓ Structured analysis
  • ✓ Quick reasoning
  • ✓ Scoring tasks
Key Strengths:

Fast reasoning, Good logic chains, Cost-efficient

Choose DeepSeek R1 0528 when:

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

Improved accuracy, Reduced hallucination, Strong math

Verdict: o3 Mini vs DeepSeek R1 0528

For cost efficiency, o3 Mini wins at $0.04/1M input tokens. For speed, o3 Mini is faster at ~1000ms. o3 Mini excels at Structured analysis 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

o3 Mini costs $0.04/1M input tokens and $0.16/1M output tokens. DeepSeek R1 0528 costs $0.08 input and $0.15 output. o3 Mini is 2.0x cheaper on input tokens. XALEN offers batch processing at 50% discount on both models.

Performance & Context

o3 Mini has a 200K context window with ~1000ms latency. DeepSeek R1 0528 offers 128K context at ~800ms. o3 Mini has the larger context window.

Best For

o3 Mini (Reasoning) is optimized for: Structured analysis, Quick reasoning, Scoring tasks. 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 o3 Mini
response_a = client.chat.completions.create(
    model="o3-mini",
    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, o3 Mini or DeepSeek R1 0528?

o3 Mini (Reasoning, ~200B) offers Fast reasoning. DeepSeek R1 0528 (Reasoning, 671B) offers Improved accuracy. Choose o3 Mini for Structured analysis or DeepSeek R1 0528 for Calculation verification.

How much does o3 Mini cost vs DeepSeek R1 0528?

o3 Mini: $0.04/1M input, $0.16/1M 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 o3 Mini and DeepSeek R1 0528 by changing the model parameter. No code changes needed.

Related Comparisons

o3 Mini vs o3 o3 Mini vs o4-mini o3 Mini vs DeepSeek R1 o3 Mini vs DeepSeek R1 Distill 70B o3 Mini vs DeepSeek R1 Distill 8B o3 Mini vs DeepSeek R1 Distill 32B

Last updated: 2026-05-21. Pricing and specifications may change. Check pricing page for latest rates.