LLM API Cost Calculator

See what you're spending on AI API calls — and how much you could save with RelayPlane smart routing.

Select Your Model

Configure Usage

~250 words

~125 words

Your Current Spend

Per Request
$0.0105
Per Day
$1.05
Per Month
$31.50
Per Year
$383.25

With RelayPlane Smart Routing

Current spend$31.50/mo
With RelayPlane$17.32/mo
Estimated savings$14.17/mo
45% cheaper

$170.10 saved per year

Estimate based on routing ~60% of requests to faster/cheaper models for simple tasks, ~30% to mid-tier models, ~10% kept on your selected model for complex tasks.

Install RelayPlane — Free

No code changes required. Works with any OpenAI-compatible client.

Note: Costs are estimates based on official pricing.

Actual costs may vary based on:

  • Prompt engineering
  • Response length limits
  • Volume discounts
  • Model updates

Model Comparison (Current Usage)

ModelProviderPer RequestPer MonthPer YearWith RelayPlane
gpt-4o-miniOpenAI$0.0004$1.35$16.43$1.15/mo(-15%)
gemini-2.5-flashGoogle$0.0004$1.35$16.43$1.15/mo(-15%)
claude-haiku-4-5Anthropic$0.0028$8.40$102.20$7.14/mo(-15%)
gemini-2.5-proGoogle$0.0100$30.00$365.00$15.00/mo(-50%)
claude-sonnet-4-6Anthropic$0.0105$31.50$383.25$17.32/mo(-45%)
gpt-5OpenAI$0.0250$75.00$912.50$33.75/mo(-55%)
claude-opus-4-6Anthropic$0.0525$157.50$1,916.25$70.88/mo(-55%)

Stop overpaying for LLM API calls

RelayPlane routes your requests automatically — sending simple tasks to cheaper models and complex ones to the best model. Free to install, no code changes required.