GPT-5 Pro API Cost Calculator
Estimate your monthly API costs for GPT-5 Pro from Openai.
Pricing per 1M tokens
Pricing last verified: Mar 21, 2026
30-Day Price History
Solid line: input price · Dashed line: output price
Estimate Your Costs
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Cost Breakdown
Compare with Similar Models
| Model | Input/1M | Output/1M |
|---|---|---|
| o3 Pro Openai | $20.00 | $80.00 |
| GPT-4 Openai | $30.00 | $60.00 |
| GPT-4 (older v0314) Openai | $30.00 | $60.00 |
| GPT-5.2 Pro Openai | $21.00 | $168.00 |
| o1 Openai | $15.00 | $60.00 |
Frequently Asked Questions
How much does GPT-5 Pro cost per token?
GPT-5 Pro is priced at $15.00 per 1M input tokens and $120.00 per 1M output tokens. Use the calculator above to estimate your monthly costs based on your usage volume.
What is the context window for GPT-5 Pro?
GPT-5 Pro has a context window of 400K tokens (400,000 tokens). The maximum output length is 128K tokens.
Does GPT-5 Pro support image inputs (vision)?
Yes, GPT-5 Pro supports vision/image inputs. You can send images as part of your prompts.
Does GPT-5 Pro support function calling (tool use)?
Yes, GPT-5 Pro supports function calling (also called tool use). You can define custom functions that the model can invoke as part of its responses.
How does GPT-5 Pro compare to similar models?
GPT-5 Pro costs $15.00 input and $120.00 output per 1M tokens. o1 is less expensive at $15.00 input and $60.00 output per 1M tokens. See the "Compare with Similar Models" table above, or visit the o1 page at /tools/cost-calculator/openai/o1.