GPT-5 vs o3
GPT-5 vs o3: GPT-5 is cheaper for input-heavy usage ($1.25/M vs $2.00/M input tokens), while GPT-5 is better for long-context tasks (1,000,000 tokens).
Direct answer: choose GPT-5 for lower token spend and choose GPT-5 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
o3
Cost Differences
o3 costs less than GPT-5
Quick Recommendation
Winner for direct API pricing: o3. At the default workload, o3 saves about $0.75/month ($9.125/year) versus GPT-5.
Feature Comparison
| Feature | GPT-5 | o3 |
|---|---|---|
| Provider | OpenAI | OpenAI |
| Input Price | $1.25/1M tokens | $2.00/1M tokens |
| Output Price | $10.00/1M tokens | $8.00/1M tokens |
| Context Window | 1,000,000 tokens | 1,000,000 tokens |
| Max Output | 131,072 tokens | 131,072 tokens |
| Category | flagship | reasoning |
| Capabilities | textvisionaudiocode | textreasoningvisioncode |
| Release Date | 8/7/2025 | 4/16/2025 |
GPT-5 vs o3: Which Should You Choose?
Choosing between GPT-5 and o3 depends on your priorities: cost efficiency, context length, or raw capability. o3 is the more affordable option at $2.00/1M input tokens.
These models target different tiers: GPT-5 is a flagship model while o3 is reasoning. This means they're optimized for different workloads. GPT-5 is built for complex tasks that require deeper reasoning, while o3 offers better value for routine operations.
Output costs matter too. GPT-5 charges $10.00/1M output tokens vs $8.00 for o3. For generation-heavy workloads (content creation, code generation, summarization), output pricing often dominates your bill. o3 has the edge here at $8.00/1M output tokens.
Multimodal capabilities: Both models support vision (image understanding), so you can send images alongside text prompts with either option.
Best Use Cases
Choose GPT-5 when:
- • Budget is a primary concern
- • You're already using OpenAI's API ecosystem
Choose o3 when:
- • You're already using OpenAI's API ecosystem
Pros and Caveats at a Glance
GPT-5
- • Input pricing: $1.25/M tokens
- • Output pricing: $10.00/M tokens
- • Context window: 1,000,000 tokens
- • Max output: 131,072 tokens
Watch out for
- • Higher output cost than o3
o3
- • Input pricing: $2.00/M tokens
- • Output pricing: $8.00/M tokens
- • Context window: 1,000,000 tokens
- • Max output: 131,072 tokens
Watch out for
- • Higher input cost than GPT-5
Try Different Scenarios
Use the calculator below to see how costs change with different usage patterns
GPT-5 (OpenAI)
o3 (OpenAI)
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Which model has better overall pricing for heavy usage?▼
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