Estimate your monthly API cost.
Choose a request, chat, or agent workload. Adjust the starting values to match your product. This estimates API usage, not subscription capacity.
This tool estimates token-billed API workloads. It does not calculate Coding Plan subscription prices or Product Plan allocations for your product.
Three choices shape every estimate.
Choose a workload, then replace the starting assumptions with values from your application. Agent presets describe example workflows, not product benchmarks.
What does one workload look like?
Requests counted separately · Chat history · Tools and model calls
API · Chat · Agent
Workflow preset
A compact loop that alternates model actions and tool observations.
Simple tool loop
Model and cost assumptions
The workload multiplier scales the complete scenario, including model and tool calls, to represent retries or repeated runs.
Context limit · rates
Count what the model processes on each call.
Include instructions, earlier messages, plans, and tool results each time they are sent to the model. Count parallel workers as separate calls.
Include context sent again.
A run with five model calls counts its repeated prefix five times, so input grows with the number of calls.
Count each model call.
Planning, worker tasks, summaries, and retries may add calls to the workflow.
Check the largest context.
Monthly tokens help estimate cost. The largest request context helps assess model fit.
Use rates for your model.
Replace the example rates and context limit with the values that apply to your selected model.
Use the estimate to compare API rates. For a Product Plan, share your peak traffic and request-size assumptions with us.
Continue exploring
1,000 calls a day · 30 days · 50% cached input
What will GPT-OSS 120B cost?
Compare four rate cards, including ours, using your request volume, token usage, and cache assumptions.
27terms defined
- Capacity units
- 11
- Plan mechanics
- 8
- Coding windows
- 5
A fourth group, reading a rate, adds three more
Capacity and plan terms, defined
A working glossary for capacity plans and coding plans: 27 terms, each quoted from the vendor's own page or from ours, with the ones we have not published marked.
6units for one allowance
- Formula public
- 1 of 6
- No figure
- 3 of 6
- Open signup
- 5 of 6
Six vendors' published units, checked September 29, 2026
How coding plans count usage: credits, requests, dollars, and windows
A coding plan's price is comparable; its allowance is not. What one unit counts at each vendor, which window refills it, and what the pages leave unsettled.