GPT-5 Pro vs o3-mini
GPT-5 Pro vs o3-mini: o3-mini is cheaper for input-heavy usage ($1.10/M vs $15.00/M input tokens), while o3-mini is better for long-context tasks (500,000 tokens).
Direct answer: choose o3-mini for lower token spend and choose o3-mini 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 Pro
o3-mini
Cost Differences
o3-mini costs less than GPT-5 Pro
Quick Recommendation
Winner for direct API pricing: o3-mini. At the default workload, o3-mini saves about $215.10/month ($2,617.05/year) versus GPT-5 Pro.
Feature Comparison
| Feature | GPT-5 Pro | o3-mini |
|---|---|---|
| Provider | OpenAI | OpenAI |
| Input Price | $15.00/1M tokens | $1.10/1M tokens |
| Output Price | $120.00/1M tokens | $4.40/1M tokens |
| Context Window | 200,000 tokens | 500,000 tokens |
| Max Output | 100,000 tokens | 65,536 tokens |
| Category | flagship | reasoning |
| Capabilities | textvisioncodereasoning | textreasoningcode |
| Release Date | 8/7/2025 | 1/31/2025 |
GPT-5 Pro vs o3-mini: Which Should You Choose?
Choosing between GPT-5 Pro and o3-mini depends on your priorities: cost efficiency, context length, or raw capability. o3-mini is the more affordable option at $1.10/1M input tokens — 93% cheaper than GPT-5 Pro. Meanwhile, o3-mini offers a significantly larger context window at 500,000 tokens vs 200,000 for GPT-5 Pro.
These models target different tiers: GPT-5 Pro is a flagship model while o3-mini is reasoning. This means they're optimized for different workloads. GPT-5 Pro is built for complex tasks that require deeper reasoning, while o3-mini offers better value for routine operations.
Output costs matter too. GPT-5 Pro charges $120.00/1M output tokens vs $4.40 for o3-mini. 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.
Multimodal capabilities: GPT-5 Pro supports vision (image inputs) while o3-mini is text-only. If your application needs image understanding, this narrows your choice.
Best Use Cases
Choose GPT-5 Pro when:
- • You need more capabilities (vision)
- • You need longer outputs (up to 100,000 tokens)
- • You're already using OpenAI's API ecosystem
Choose o3-mini when:
- • Budget is a primary concern
- • You need a larger context window (500,000 tokens)
- • You're already using OpenAI's API ecosystem
Pros and Caveats at a Glance
GPT-5 Pro
- • Input pricing: $15.00/M tokens
- • Output pricing: $120.00/M tokens
- • Context window: 200,000 tokens
- • Max output: 100,000 tokens
Watch out for
- • Higher input cost than o3-mini
- • Higher output cost than o3-mini
- • Smaller context window than o3-mini
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
- • Trade-offs are minor in this matchup.
Try Different Scenarios
Use the calculator below to see how costs change with different usage patterns
GPT-5 Pro (OpenAI)
o3-mini (OpenAI)
Start using GPT-5 Pro today
Sign Up for OpenAI →Start using o3-mini today
Sign Up for OpenAI →Frequently Asked Questions
Which is cheaper, GPT-5 Pro or o3-mini?▼
What is the context window difference between GPT-5 Pro and o3-mini?▼
Which model is better for AI Agent / Agentic Workflows?▼
Which model has better overall pricing for heavy usage?▼
Related Comparisons
Related Articles
Learn when to pick each model, then compare live pricing scenarios.