How much does your context window really cost?

Calculate the true cost of LLM API calls based on prompt size, completion length, and model choice. Compare pricing across GPT-4o, Claude, Gemini, and more.

LLM Context Cost Calculator

Enter your usage parameters below

Input / Prompt Tokens

Number of tokens in your prompt per request

Output / Completion Tokens

Number of tokens in the model response

Requests Per Day

Average number of API calls per day

LLM Model

$2.5/M input · $10/M output · 128k context

Cost Per Request

$0.022

GPT-4o — OpenAI

Daily Cost

$2.25

Monthly Cost

$67.50

Annual Cost

$810.00

Cost Per 1K Tokens

$0.0037

Blended input + output rate

Input vs Output Split

56% / 44%

Input cost vs output cost

Cheapest Alternative

GPT-4.1-nano

$2.70/mo — save 96% ($64.80/mo)

OpenAI · budget

Optimize your LLM spend

Platforms like OpenRouter, Together AI, and Groq offer competitive pricing and unified APIs across multiple models. Fireworks AI and Anyscale specialize in high-throughput inference at lower cost.

OpenRouterTogether AIGroqFireworks AIAnyscale

Need help optimizing LLM costs?

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