Model: OpenAI: GPT-5.1 Chat, Context: 128000, Cost: $1.25 per 1M input tokens, $10 per 1M output tokens
Note: Calculation is approximate based on public data. Prices may change, check official websites.
This calculator helps estimate the API cost for using OpenAI GPT-5.1 Chat, a fast and lightweight model optimized for low-latency chat and interactive workloads. Known for its strong general intelligence, adaptive reasoning for complex queries, and conversational style, GPT-5.1 Chat is designed for high-throughput applications where responsiveness and consistency are key.
The pricing structure is as follows:
- Input tokens: $1.25 per 1,000,000 tokens
- Output tokens: $10.00 per 1,000,000 tokens
- Context window: 128,000 tokens
To calculate the total cost, use the following formula:
Total Cost = (Input Tokens / 1,000,000 * $1.25) + (Output Tokens / 1,000,000 * $10.00) * Number of Requests
Example: For 500,000 input tokens and 100,000 output tokens in one request:
- Input Cost: (500,000 / 1,000,000) * $1.25 = $0.625
- Output Cost: (100,000 / 1,000,000) * $10.00 = $1.00
- Total Cost: $0.625 + $1.00 = $1.625
Enter your desired number of input and output tokens, along with the number of requests, to get an estimated cost. You can also calculate in EUR by providing an exchange rate.