AI Agent API Commitment & Prepaid Credit ROI Calculator
Compare on-demand LLM API pricing versus prepaid commitments and volume credits. Estimate break-even utilization, commitment waste, effective rate, and ROI.
Scenario presets
Workload
Commitment terms are representative. Always confirm actual discounts and minimums with the provider. Last updated: 2026-07-09. See notes.
On-demand monthly cost
—
Best commitment monthly cost
—
Monthly savings vs on-demand
—
Projected ROI over term
—
Provider comparison for this workload
| Provider | On-demand / mo | Commitment / mo | Waste / mo | Break-even util. | Verdict |
|---|---|---|---|---|---|
| OpenAI API GPT-4o family | — | — | — | — | — |
| Anthropic API Claude 3.5 Sonnet family | — | — | — | — | — |
| Google Gemini API Gemini 1.5 Pro | — | — | — | — | — |
| Azure OpenAI Service GPT-4o | — | — | — | — | — |
| Together AI Llama 3.1 70B | — | — | — | — | — |
| Fireworks AI Llama 3.1 70B | — | — | — | — | — |
| Groq Llama 3.1 70B | — | — | — | — | — |
Best pricing route
Enter a workload to see the cheapest route.
Verdict
—
Frequently asked questions
When does a prepaid API commitment actually save money?
A commitment saves money only when your actual usage is high enough to absorb the minimum spend and the discount outweighs any unused portion. If you commit $3,000/month but only use $2,000 worth of tokens, the waste usually wipes out the discount.
How is break-even utilization calculated?
Break-even utilization is the share of a committed minimum spend you must actually consume before the discounted commitment becomes cheaper than pure on-demand. Below that share, on-demand is cheaper; above it, the commitment wins.
What counts as commitment waste?
Waste is the gap between the discounted spend you would have incurred at actual usage and the minimum spend you are contractually obligated to pay. Some providers bill overages at on-demand rates; others require a true-up. The calculator treats waste as the excess commitment floor.
Do all providers offer commitments?
No. OpenAI, Anthropic, Google, and Groq do not publish standard prepaid discounts in their public APIs. Azure OpenAI, Together AI, and Fireworks AI commonly offer committed-use or enterprise discounts. Always verify current contract terms with the provider.
What if my usage grows during the term?
If you expect growth, model the ramp separately by month or use an average. The calculator uses a flat monthly volume and a utilization percentage of the committed floor; for high-growth workloads, err toward shorter terms or lower commits.
Commitment discounts and minimums are representative of published enterprise/volume programs (e.g., Azure OpenAI reserved capacity, Together AI volume tiers, Fireworks enterprise commits). Replace with your actual contract terms. On-demand rates are approximations; check provider pricing pages before signing.