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Τι είναι το GPT API Cost;

The GPT API Cost Calculator estimates your monthly OpenAI API expense based on model selection, token usage, and call volume. It covers GPT-4o, GPT-4-turbo, GPT-4, GPT-3.5-turbo, and o1 models with separate input and output token pricing.

Τύπος

T_in

Input Tokens (tokens/request) — Average tokens sent per API call (prompt + system message)

T_out

Output Tokens (tokens/request) — Average tokens generated per API response

N

Monthly API Calls (calls/month) — Total number of API requests per month

P_in

Input Price ($/1M tokens) — Price per million input tokens for selected model

P_out

Output Price ($/1M tokens) — Price per million output tokens for selected model

Οδηγός βήμα προς βήμα

1. 1Select the OpenAI model (GPT-4o, GPT-4-turbo, GPT-3.5-turbo, o1, etc.)
2. 2Enter your average input tokens per request and output tokens per response
3. 3Specify the number of API calls per day or month
4. 4View the total monthly cost with a breakdown of input vs. output expenses

Worked Examples

Common Mistakes to Avoid

• ✕Using the same price for input and output tokens — output tokens are typically 2-4x more expensive than input tokens
• ✕Not accounting for system prompt tokens that are sent with every API call, adding significant hidden cost at scale
• ✕Ignoring token overhead from conversation history in chat-based applications, which grows with each turn

Frequently Asked Questions