OpenAI API Pricing 2026: GPT-5, O1, O3 Cost Comparison (February 2026)
OpenAI API pricing 2026: GPT-5, O1, O3, GPT-4o cost per million tokens. Includes input/output pricing, context limits, and how to optimize costs.
OpenAI API Pricing 2026
TL;DR — OpenAI API Prices (Feb 2026)
- GPT-5: $1.25/$10.00 per 1M input/output tokens
- GPT-4.1: $2.00/$8.00 per 1M tokens
- GPT-4o Mini: $0.15/$0.60 per 1M tokens
- O1 (Reasoning): $15.00/$60.00 per 1M tokens
- O3 (Advanced): $2.00/$8.00 per 1M tokens
OpenAI offers the widest range of models from cheap fast models to expensive reasoning powerhouses.
GPT-5 Family (Flagship)
| Model | Context | Input / 1M tokens | Output / 1M tokens |
|---|---|---|---|
| GPT-5.2 Pro | 400K | $21.00 | $168.00 |
| GPT-5.1 | 400K | $10.00 | $80.00 |
| GPT-5 | 400K | $1.25 | $10.00 |
| GPT-5 Mini | 400K | $0.25 | $2.00 |
| GPT-5 Nano | 400K | $0.05 | $0.40 |
O-Series (Reasoning)
| Model | Context | Input / 1M tokens | Output / 1M tokens |
|---|---|---|---|
| O3 Pro | 200K | $150.00 | $600.00 |
| O1 | 200K | $15.00 | $60.00 |
| O1 Mini | 200K | $1.10 | $4.40 |
GPT-4 Family
| Model | Context | Input / 1M tokens | Output / 1M tokens |
|---|---|---|---|
| GPT-4.1 | 1M | $2.00 | $8.00 |
| GPT-4.1 Mini | 1M | $0.40 | $1.60 |
| GPT-4.1 Nano | 1M | $0.10 | $0.40 |
| GPT-4o | 128K | $2.50 | $10.00 |
| GPT-4o Mini | 128K | $0.15 | $0.60 |
Cost Optimization Tips
- Use Mini models for simple tasks - 10-50x cheaper
- Prompt caching - 50-90% off for repeated context
- Batch API - 50% off for async processing
- Choose the right model - Don't use O1 for simple queries
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