How much does an agent cost per task it actually finishes?
An agent that succeeds 80% of the time and retries its failures does not cost one attempt per task — it costs every attempt, including the failed ones. Enter your tasks, success rate, and retries to see the cost per completed task, not just the cost per try.
Configure your agent task
Estimated cost per completed task
This prices LLM inference/token cost only, including retries. Not included: search APIs, browsing APIs, other external tools, vector databases, hosting, or infrastructure. Retries are modelled as independent attempts with the same success rate — a stated assumption, not a measured figure.
This is an estimate, not a billing guarantee. Actual costs depend on your provider's exact tokeniser, your agent's real step count, tool usage, and true success rate.
Worked examples (same agent, only the success rate changes)
200 tasks attempted per month, 5 steps per attempt, standard instruction, medium task input and step output, one standard tool call per step, 1 retry per failed task, GPT-5.4 Mini. Every figure below is computed by the same engine as the calculator above.
| Success rate per attempt | Tasks completed / month | Cost per completed task (Likely) |
|---|---|---|
| 95% | 200 | $0.0130 |
| 80% | 192 | $0.0155 |
| 50% | 150 | $0.0248 |
Caveats
This is an estimate, not a billing guarantee. Retries are modelled as independent attempts with the same success rate — a stated assumption, not a measured figure. Tool and API fees, hosting, and infrastructure are not included.