AitopkitAPI bills scale with tokens, not vibes. Enter your average input and output tokens per request and how many requests you make each month, and this calculator estimates your cost for 8 popular models — side by side, for the exact same workload.
Compare all 8 models for the same workload
The table below recomputes instantly as you change your token counts or request volume, so you can see what the same job costs on every model.
| Model | Input / 1M tokens | Output / 1M tokens | Per request | Per month |
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How the math works
Cost per request = (input tokens ÷ 1,000,000 × input price) + (output tokens ÷ 1,000,000 × output price). Monthly estimate = cost per request × requests per month. Output tokens usually cost several times more than input tokens, so a model that writes long answers can cost far more than its input price suggests — that is why the comparison table matters more than any single headline price. For ready-made prompts to run on these models, see our prompt library, and for free tiers before you pay, see free AI tools.