OpenAI o3-mini vs. DeepSeek R1 (Reasoner) — Interactive Cost & Performance Calculator
Compare OpenAI o3-mini vs DeepSeek R1 (Reasoner) side-by-side. Use our interactive calculator to estimate exact monthly costs, savings, and performance trade-offs at your scale.
OpenAI o3-mini
Best for: Fast STEM reasoning, math, and unit-tested code generation
DeepSeek R1 (Reasoner)
Best for: Chain-of-thought math, architecture & algorithm reasoning at 80% lower cost
Side-by-Side Technical & Commercial Breakdown: OpenAI o3-mini vs. DeepSeek R1 (Reasoner)
| Dimension | OpenAI o3-mini | DeepSeek R1 (Reasoner) |
|---|---|---|
| Provider | OpenAI | OpenRouter / DeepSeek |
| Input Price (per 1M tokens) | $1.100 | $0.550 |
| Output Price (per 1M tokens) | $4.40 | $2.19 |
| Context Window | 200K tokens | 128K tokens |
| Throughput Speed | 95 tok/s | 68 tok/s |
| License / Weights | Proprietary API | Open Weights (MIT) |
| Best Use Case | Fast STEM reasoning, math, and unit-tested code generation | Chain-of-thought math, architecture & algorithm reasoning at 80% lower cost |
Frequently Asked Questions
Which is more cost-effective in 2026: OpenAI o3-mini or DeepSeek R1 (Reasoner)?
It depends on your workload volume. Use the interactive sliders above to model your exact monthly scale. OpenAI o3-mini (Fast STEM reasoning, math, and unit-tested code generation) and DeepSeek R1 (Reasoner) (Chain-of-thought math, architecture & algorithm reasoning at 80% lower cost) have different unit economics that cross over as volume scales.
When should an engineering team choose OpenAI o3-mini over DeepSeek R1 (Reasoner)?
Choose OpenAI o3-mini when your primary priority is: Fast STEM reasoning, math, and unit-tested code generation. Choose DeepSeek R1 (Reasoner) when you prioritize: Chain-of-thought math, architecture & algorithm reasoning at 80% lower cost.