GPT-4 Turbo API Cost Calculator
Estimate your monthly API costs for GPT-4 Turbo from Openai.
Pricing per 1M tokens
Pricing last verified: Mar 21, 2026
30-Day Price History
Solid line: input price · Dashed line: output price
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Cost Breakdown
Compare with Similar Models
| Model | Input/1M | Output/1M |
|---|---|---|
| GPT-4 Turbo (older v1106) Openai | $10.00 | $30.00 |
| GPT-4 Turbo Preview Openai | $10.00 | $30.00 |
| o3 Deep Research Openai | $10.00 | $40.00 |
| GPT-4o (extended) Openai | $6.00 | $18.00 |
| GPT-4o (2024-05-13) Openai | $5.00 | $15.00 |
Frequently Asked Questions
How much does GPT-4 Turbo cost per token?
GPT-4 Turbo is priced at $10.00 per 1M input tokens and $30.00 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-4 Turbo?
GPT-4 Turbo has a context window of 128K tokens (128,000 tokens). The maximum output length is 4.1K tokens.
Does GPT-4 Turbo support image inputs (vision)?
Yes, GPT-4 Turbo supports vision/image inputs. You can send images as part of your prompts.
Does GPT-4 Turbo support function calling (tool use)?
Yes, GPT-4 Turbo 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-4 Turbo compare to similar models?
GPT-4 Turbo costs $10.00 input and $30.00 output per 1M tokens. GPT-4o (2024-05-13) is less expensive at $5.00 input and $15.00 output per 1M tokens. See the "Compare with Similar Models" table above, or visit the GPT-4o (2024-05-13) page at /tools/cost-calculator/openai/gpt-4o-2024-05-13.