GPT-5 mini vs o3-pro
GPT-5 mini vs o3-pro: GPT-5 mini is cheaper for input-heavy usage ($0.25/M vs $20.00/M input tokens), while o3-pro is better for long-context tasks (1,000,000 tokens).
Direct answer: choose GPT-5 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)
GPT-5 mini
o3-pro
Cost Differences
o3-pro costs more than GPT-5 mini
Quick Recommendation
Winner for direct API pricing: GPT-5 mini. At the default workload, GPT-5 mini saves about $176.25/month ($2,144.375/year) versus o3-pro.
Feature Comparison
| Feature | GPT-5 mini | o3-pro |
|---|---|---|
| Provider | OpenAI | OpenAI |
| Input Price | $0.25/1M tokens | $20.00/1M tokens |
| Output Price | $2.00/1M tokens | $80.00/1M tokens |
| Context Window | 500,000 tokens | 1,000,000 tokens |
| Max Output | 65,536 tokens | 131,072 tokens |
| Category | efficient | reasoning |
| Capabilities | textvisioncode | textreasoningcode |
| Release Date | 8/7/2025 | 6/10/2025 |
GPT-5 mini vs o3-pro: Which Should You Choose?
Choosing between GPT-5 mini and o3-pro depends on your priorities: cost efficiency, context length, or raw capability. GPT-5 mini is the more affordable option at $0.25/1M input tokens — 99% cheaper than o3-pro. Meanwhile, o3-pro offers a significantly larger context window at 1,000,000 tokens vs 500,000 for GPT-5 mini.
These models target different tiers: GPT-5 mini is a efficient model while o3-pro is reasoning. This means they're optimized for different workloads. o3-pro targets more demanding workloads, while GPT-5 mini provides a cost-effective option for everyday tasks.
Output costs matter too. GPT-5 mini charges $2.00/1M output tokens vs $80.00 for o3-pro. For generation-heavy workloads (content creation, code generation, summarization), output pricing often dominates your bill. GPT-5 mini has the edge here at $2.00/1M output tokens.
Multimodal capabilities: GPT-5 mini supports vision (image inputs) while o3-pro is text-only. If your application needs image understanding, this narrows your choice.
Best Use Cases
Choose GPT-5 mini when:
- • Budget is a primary concern
- • You're already using OpenAI's API ecosystem
- • You're running high-volume, latency-sensitive workloads
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
GPT-5 mini
- • Input pricing: $0.25/M tokens
- • Output pricing: $2.00/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 GPT-5 mini
- • Higher output cost than GPT-5 mini
Try Different Scenarios
Use the calculator below to see how costs change with different usage patterns
GPT-5 mini (OpenAI)
o3-pro (OpenAI)
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Sign Up for OpenAI →Frequently Asked Questions
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What is the context window difference between GPT-5 mini and o3-pro?▼
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