o3-mini vs o3-pro
o3-mini vs o3-pro: o3-mini is cheaper for input-heavy usage ($1.10/M vs $20.00/M input tokens), while o3-pro is better for long-context tasks (1,000,000 tokens).
Direct answer: choose o3-mini for lower token spend and choose o3-pro when your workload needs longer context.
Compare input and output token pricing, context windows, and monthly cost estimates on one page so you can pick the cheaper model fast.
Cost Comparison (1000 input + 500 output tokens, 100 requests/day)
o3-mini
o3-pro
Cost Differences
o3-pro costs more than o3-mini
Quick Recommendation
Winner for direct API pricing: o3-mini. At the default workload, o3-mini saves about $170.10/month ($2,069.55/year) versus o3-pro.
Feature Comparison
| Feature | o3-mini | o3-pro |
|---|---|---|
| Provider | OpenAI | OpenAI |
| Input Price | $1.10/1M tokens | $20.00/1M tokens |
| Output Price | $4.40/1M tokens | $80.00/1M tokens |
| Context Window | 500,000 tokens | 1,000,000 tokens |
| Max Output | 65,536 tokens | 131,072 tokens |
| Category | reasoning | reasoning |
| Capabilities | textreasoningcode | textreasoningcode |
| Release Date | 1/31/2025 | 6/10/2025 |
o3-mini vs o3-pro: Which Should You Choose?
Choosing between o3-mini and o3-pro depends on your priorities: cost efficiency, context length, or raw capability. o3-mini is the more affordable option at $1.10/1M input tokens — 95% cheaper than o3-pro. Meanwhile, o3-pro offers a significantly larger context window at 1,000,000 tokens vs 500,000 for o3-mini.
Both models are in the reasoning category, making this a direct head-to-head comparison. At scale — say 10,000 requests per day — the cost difference adds up: o3-mini would save you roughly $17,010.00/month compared to o3-pro. For startups and indie developers, that difference can be significant.
Output costs matter too. o3-mini charges $4.40/1M output tokens vs $80.00 for o3-pro. For generation-heavy workloads (content creation, code generation, summarization), output pricing often dominates your bill. o3-mini has the edge here at $4.40/1M output tokens.
Best Use Cases
Choose o3-mini when:
- • Budget is a primary concern
- • You're already using OpenAI's API ecosystem
Choose o3-pro when:
- • You need a larger context window (1,000,000 tokens)
- • You need longer outputs (up to 131,072 tokens)
- • You're already using OpenAI's API ecosystem
Pros and Caveats at a Glance
o3-mini
- • Input pricing: $1.10/M tokens
- • Output pricing: $4.40/M tokens
- • Context window: 500,000 tokens
- • Max output: 65,536 tokens
Watch out for
- • Smaller context window than o3-pro
o3-pro
- • Input pricing: $20.00/M tokens
- • Output pricing: $80.00/M tokens
- • Context window: 1,000,000 tokens
- • Max output: 131,072 tokens
Watch out for
- • Higher input cost than o3-mini
- • Higher output cost than o3-mini
Try Different Scenarios
Use the calculator below to see how costs change with different usage patterns
o3-mini (OpenAI)
o3-pro (OpenAI)
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Sign Up for OpenAI →Frequently Asked Questions
Which is cheaper, o3-mini or o3-pro?▼
What is the context window difference between o3-mini and o3-pro?▼
Which model is better for AI Agent / Agentic Workflows?▼
Which model has better overall pricing for heavy usage?▼
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