How does the Token ROI Calculator work?

The calculator estimates your monthly LLM API costs based on your usage (monthly active users, prompts per day, token counts, and model pricing). It then projects potential revenue from Vexrail contextual ads based on ad frequency and eCPM rates, showing your net cost or profit.

What is eCPM and what eCPM can I expect with Vexrail?

eCPM (effective Cost Per Mille) is the revenue earned per 1,000 ad impressions. Vexrail's contextual ads in AI conversations typically achieve higher eCPMs than traditional display ads because they are intent-driven and non-intrusive. The default $15 is a starting assumption; adjust to match your traffic and demand.

Are the LLM model prices accurate?

The prices are sourced from official provider pricing pages and the OpenRouter API as of February 2026. LLM pricing changes frequently, so you can always select 'Custom' and enter the exact rates from your provider agreement or API dashboard.

Can Vexrail really cover my entire LLM API cost?

It depends on your usage patterns. For many AI applications with moderate usage, Vexrail revenue can partially or fully offset LLM costs. Apps with higher engagement and relevant ad contexts tend to see the best results. The calculator helps you model your specific scenario.

What ad frequency is recommended?

The default of 1 ad every 3 prompts strikes a good balance between revenue and user experience. Vexrail ads are contextual text suggestions — not banners — so they feel like helpful recommendations rather than interruptions. You can adjust the frequency to match your app's UX.

Free Tool

AI Token ROI Calculator

Estimate your monthly LLM API costs for GPT-4o, Claude, Gemini, and 13 other models. See exactly how Vexrail contextual ads can offset your token spending.

App Usage

Monthly Active Users (MAU)

Avg Prompts / User / Day

360,000 total prompts / month

LLM Costs

LLM Model

Avg Input Tokens / Prompt

Avg Output Tokens / Prompt

Cost / 1M Input Tokens ($)

Cost / 1M Output Tokens ($)

Vexrail Revenue

Ad Frequency (1 ad every X prompts)

eCPM (Revenue per 1,000 impressions)

120,000 ad impressions / month

Monthly Projection

Total API Cost-$187.20

Vexrail Revenue+$1,800.00

Net Cost / Profit+$1,612.80

Estimated offset: 962% of your API costs

Based on a 30-day month. Estimates vary by geo, vertical, fill rate, seasonality, and policy approval.

Cost per Prompt

$0.00052

Revenue per Prompt

$0.00500

Cost per User / Month

$0.19

Revenue per User / Month

$1.80

How the Calculator Works

1. Estimate Your LLM Costs

Select your LLM provider and model from 16 options spanning OpenAI, Anthropic, Google, Meta, xAI, DeepSeek, and Mistral. Pricing auto-fills from current API rates, or enter custom values. Input your MAU, prompts per day, and average token counts to calculate your total monthly API spend.

2. Project Vexrail Ad Revenue

Configure how often contextual ads appear in your AI conversations and the expected eCPM. Vexrail's intent-driven ads deliver higher engagement than traditional display, with eCPMs of $10–$25+ for high-intent AI interactions.

3. See Your Net ROI

The calculator shows your monthly API cost, projected revenue, net profit or loss, and the percentage of costs Vexrail can offset. Per-prompt and per-user breakdowns help you understand unit economics.

4. Optimize Your Model Choice

Compare models across providers to find the best cost-to-performance ratio. A cheaper model combined with Vexrail revenue can make your AI application cash-flow positive from day one.

Frequently Asked Questions

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