AI & Prompt Tools · Free tool
AI Agent Loop Cost Estimator
Agent loops accumulate context every step. This calculator runs the triangular-sum cost across 7 frontier models so you don't get a surprise bill.
Updated May 2026
| Model | $/run | $/month |
|---|---|---|
| DeepSeek V3.2 | $0.0256 | $12.82 |
| GPT-5 mini | $0.0308 | $15.4 |
| Gemini 2.5 Flash | $0.0377 | $18.84 |
| Gemini 2.5 Pro | $0.118 | $59 |
| GPT-5 | $0.236 | $118 |
| Claude Sonnet 4.6 | $0.3048 | $152.4 |
| Claude Opus 4.7 | $1.524 | $762 |
The hidden cost: agentic loops accumulate context across steps. By step 12, the model is reading every prior tool call + result. This calculator uses the standard triangular-sum estimate. Real-world: enable prompt caching to cut the input multiplier by ~10x.
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What it does
Agent loops accumulate context across steps — by step 12, the model is reading every prior tool call + result. This calculator runs the standard triangular-sum cost across 7 frontier models. Reality check: enable prompt caching to cut the input multiplier by ~10x.
Pair with the prompt cache savings calculator.
Embed this tool on your siteShow snippetHide
Paste this snippet into any page. Loads on-demand (lazy), no tracking scripts, and sized to most dashboards. Replace the height to fit your layout.
<iframe src="https://freetoolarena.com/embed/ai-agent-loop-cost-estimator" width="100%" height="720" frameborder="0" loading="lazy" title="AI Agent Loop Cost Estimator" style="border:1px solid #e2e8f0;border-radius:12px;max-width:720px;"></iframe>How to use it
- Enter system prompt size + per-step in/out.
- Enter steps per run + runs per month.
- Read cost by model.
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