AI API Cost Calculator
Monthly cost = requests × (input tokens × input price + output tokens × output price). Prices are live from the OpenRouter catalogue and refresh hourly. See every model in the AI model comparison.
10,000 requests a month · 30M input and 5M output tokens
Claude Haiku 5.5Cheapest
Anthropic · $0.100 in / $0.500 out per 1M · 1M context
$5.50
per month
Input $3.00 · Output $2.50
GPT-6.1 Terra Pro
OpenAI · $1.00 in / $5.00 out per 1M · 1.05M context
$55.00
per month
Input $30.00 · Output $25.00
Gemini 4 Argon
Google · $2.00 in / $10.00 out per 1M · 1.05M context
$110
per month
Input $60.00 · Output $50.00