Claude 3.5 Haiku vs. OpenAI o3-mini — Interactive Cost & Performance Calculator
Compare Claude 3.5 Haiku vs OpenAI o3-mini side-by-side. Use our interactive calculator to estimate exact monthly costs, savings, and performance trade-offs at your scale.
Claude 3.5 Haiku
Best for: Fast sub-agent routing & real-time moderation
OpenAI o3-mini
Best for: Fast STEM reasoning, math, and unit-tested code generation
Side-by-Side Technical & Commercial Breakdown: Claude 3.5 Haiku vs. OpenAI o3-mini
| Dimension | Claude 3.5 Haiku | OpenAI o3-mini |
|---|---|---|
| Provider | Anthropic | OpenAI |
| Input Price (per 1M tokens) | $0.800 | $1.100 |
| Output Price (per 1M tokens) | $4.00 | $4.40 |
| Context Window | 200K tokens | 200K tokens |
| Throughput Speed | 130 tok/s | 95 tok/s |
| License / Weights | Proprietary API | Proprietary API |
| Best Use Case | Fast sub-agent routing & real-time moderation | Fast STEM reasoning, math, and unit-tested code generation |
Frequently Asked Questions
Which is more cost-effective in 2026: Claude 3.5 Haiku or OpenAI o3-mini?
It depends on your workload volume. Use the interactive sliders above to model your exact monthly scale. Claude 3.5 Haiku (Fast sub-agent routing & real-time moderation) 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 Claude 3.5 Haiku over OpenAI o3-mini?
Choose Claude 3.5 Haiku when your primary priority is: Fast sub-agent routing & real-time moderation. Choose OpenAI o3-mini when you prioritize: Fast STEM reasoning, math, and unit-tested code generation.