AI API cost calculator
Put in your real token volume. See what the official list price would be, what the gateway route costs, and what the gap is worth over a year.
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How to estimate your tokens
If you do not have exact numbers, these are realistic starting points:
| Workload | Input / month | Output / month |
|---|---|---|
| Solo dev using a coding agent daily | 150M – 400M | 10M – 30M |
| Small team (3–5 devs) | 600M – 1.5B | 40M – 100M |
| Chatbot, ~50k conversations | 80M – 200M | 15M – 40M |
| RAG pipeline, 100k documents | 300M – 800M | 30M – 80M |
What the calculator does not include
- Prompt caching. Stable system prompts can cut input cost by 60–90%. That saving applies on both sides, so the percentage gap stays similar.
- Batch API. Both official and gateway routes discount async workloads, roughly halving them.
- Long-context tiering. Some models charge more above a context threshold.
Calculators for specific tools
A generic token estimate hides what each tool actually does with context. These two have their own pages, with starting values that match how they behave:
- Claude Code cost calculator — every turn resends the accumulated conversation, so input dominates the bill.
- Cursor cost calculator — agent mode resends context on each request, so cost grows with thread length rather than message count.
Figures are estimates based on list prices verified 2026-09-26. Actual spend depends on your cache hit rate, batch usage and long-context tiering.