AI
AICalculators

ChatGPT Monthly Cost Calculator

Estimate your monthly AI API costs by use case and scale. No token math needed — pick a use case, set your volume, and compare top models side by side.

Configure Your Use Case

Token assumptions for this use case
Input / request
800 tokens
Output / request
300 tokens
100
1100K
22 days
131
Total monthly requests
2K
100 req/day × 22 days
Cheapest option for this use case
Gemini 2.0 Flash
by Google
Monthly cost
$0.44
Yearly cost
$5.28
Cost / request
$0.000200

Monthly Cost by Model

Gemini 2.0 Flash(Google)Cheapest
$0.44/mo
GPT-4o mini(OpenAI)
$0.66/mo
Claude Haiku 4.5(Anthropic)
$4.05/mo
Gemini 2.0 Pro(Google)
$8.80/mo
GPT-4o(OpenAI)
$11.00/mo
Claude Sonnet 4.5(Anthropic)
$15.18/mo

Full Comparison (cheapest first)

ModelProviderCost / reqMonthlyYearly
Gemini 2.0 Flash
Google$0.000200$0.44$5.28
GPT-4o mini
OpenAI$0.000300$0.66$7.92
Claude Haiku 4.5
Anthropic$0.001840$4.05$48.58
Gemini 2.0 Pro
Google$0.004000$8.80$105.60
GPT-4o
OpenAI$0.005000$11.00$132.00
Claude Sonnet 4.5
Anthropic$0.006900$15.18$182.16
Potential savings by choosing the cheapest model: $14.74/month ($176.88/year) compared to Claude Sonnet 4.5.

API Pricing Reference (per million tokens)

ModelInput / 1MOutput / 1M
GPT-4o(OpenAI)
$2.50$10.00
GPT-4o mini(OpenAI)
$0.15$0.60
Claude Sonnet 4.5(Anthropic)
$3.00$15.00
Claude Haiku 4.5(Anthropic)
$0.80$4.00
Gemini 2.0 Flash(Google)
$0.10$0.40
Gemini 2.0 Pro(Google)
$1.25$10.00

Prices as of early 2026. Verify at each provider's pricing page before budgeting.

Frequently Asked Questions