GPT-5 Pro vs o1
GPT-5 Pro vs o1: GPT-5 Pro is cheaper for input-heavy usage ($15.00/M vs $15.00/M input tokens), while GPT-5 Pro is better for long-context tasks (200,000 tokens).
Direct answer: choose GPT-5 Pro for lower token spend and choose GPT-5 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 Pro
o1
Cost Differences
o1 costs less than GPT-5 Pro
Quick Recommendation
Winner for direct API pricing: o1. At the default workload, o1 saves about $90.00/month ($1,095.00/year) versus GPT-5 Pro.
Feature Comparison
| Feature | GPT-5 Pro | o1 |
|---|---|---|
| Provider | OpenAI | OpenAI |
| Input Price | $15.00/1M tokens | $15.00/1M tokens |
| Output Price | $120.00/1M tokens | $60.00/1M tokens |
| Context Window | 200,000 tokens | 200,000 tokens |
| Max Output | 100,000 tokens | 65,536 tokens |
| Category | flagship | reasoning |
| Capabilities | textvisioncodereasoning | textreasoning |
| Release Date | 8/7/2025 | 9/12/2024 |
GPT-5 Pro vs o1: Which Should You Choose?
Choosing between GPT-5 Pro and o1 depends on your priorities: cost efficiency, context length, or raw capability. o1 is the more affordable option at $15.00/1M input tokens.
These models target different tiers: GPT-5 Pro is a flagship model while o1 is reasoning. This means they're optimized for different workloads. GPT-5 Pro is built for complex tasks that require deeper reasoning, while o1 offers better value for routine operations.
Output costs matter too. GPT-5 Pro charges $120.00/1M output tokens vs $60.00 for o1. For generation-heavy workloads (content creation, code generation, summarization), output pricing often dominates your bill. o1 has the edge here at $60.00/1M output tokens.
Multimodal capabilities: GPT-5 Pro supports vision (image inputs) while o1 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, code)
- • You need longer outputs (up to 100,000 tokens)
- • You're already using OpenAI's API ecosystem
Choose o1 when:
- • 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 output cost than o1
o1
- • Input pricing: $15.00/M tokens
- • Output pricing: $60.00/M tokens
- • Context window: 200,000 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)
o1 (OpenAI)
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What is the context window difference between GPT-5 Pro and o1?▼
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