DeepSeek V3 (API) vs. OpenAI o3-mini — Interactive Cost & Performance Calculator
Compare DeepSeek V3 (API) vs OpenAI o3-mini side-by-side. Use our interactive calculator to estimate exact monthly costs, savings, and performance trade-offs at your scale.
DeepSeek V3 (API)
Best for: Cost-efficient math, coding & structured JSON tasks
OpenAI o3-mini
Best for: Fast STEM reasoning, math, and unit-tested code generation
Side-by-Side Technical & Commercial Breakdown: DeepSeek V3 (API) vs. OpenAI o3-mini
| Dimension | DeepSeek V3 (API) | OpenAI o3-mini |
|---|---|---|
| Provider | DeepSeek / Fireworks | OpenAI |
| Input Price (per 1M tokens) | $0.270 | $1.100 |
| Output Price (per 1M tokens) | $1.10 | $4.40 |
| Context Window | 128K tokens | 200K tokens |
| Throughput Speed | 90 tok/s | 95 tok/s |
| License / Weights | Open Weights (MIT) | Proprietary API |
| Best Use Case | Cost-efficient math, coding & structured JSON tasks | Fast STEM reasoning, math, and unit-tested code generation |
Frequently Asked Questions
Which is more cost-effective in 2026: DeepSeek V3 (API) or OpenAI o3-mini?
It depends on your workload volume. Use the interactive sliders above to model your exact monthly scale. DeepSeek V3 (API) (Cost-efficient math, coding & structured JSON tasks) and OpenAI o3-mini (Fast STEM reasoning, math, and unit-tested code generation) have different unit economics that cross over as volume scales.
When should an engineering team choose DeepSeek V3 (API) over OpenAI o3-mini?
Choose DeepSeek V3 (API) when your primary priority is: Cost-efficient math, coding & structured JSON tasks. Choose OpenAI o3-mini when you prioritize: Fast STEM reasoning, math, and unit-tested code generation.