AI API Pricing & Cost Calculator

Compare OpenAI, Anthropic, and Gemini API pricing. Estimate cost per request, day, and month from input, cached input, output tokens, and request volume.

Read the methodology
Source-aware pricing Dated verification Transparent math
Pricing verified against the official source on Aug 2, 2026.

Usage

Describe your workload

USD per 1M tokens
Input
$2.00
Cached
$0.2
Output
$10.00

Estimated cost

Verified
$174.75per month
Per request$0.0117
Per day$5.83

Monthly breakdown

Standard input$52.50
Cached input$2.25
Output$120.00

Excludes platform fees, taxes, tools, storage, and provider-specific tier rules.

Model pages

Current AI API pricing and cost calculators by model.

Browse all models
Anthropic

Claude Sonnet 5

Verified

Anthropic's balanced Claude model, using its current limited-time first-party API price.

Input
$2.00
Cached
$0.20
Output
$10.00
Open Claude Sonnet 5 cost calculator
Google

Gemini 3.6 Flash

Verified

Google's current Flash model, calculated with the Gemini Developer API standard paid tier.

Input
$1.50
Cached
$0.15
Output
$7.50
Open Gemini 3.6 Flash cost calculator
OpenAI

GPT-5.6 Terra

Verified

OpenAI's balanced model for performance-sensitive, high-throughput production workloads.

Input
$2.00
Cached
$0.20
Output
$12.00
Open GPT-5.6 Terra cost calculator

How estimates are built

Official unit price in. Auditable monthly cost out.

  1. 01
    Verify

    Record the official source, effective date, and pricing unit.

  2. 02
    Calculate

    Keep input, cached input, and output costs separate.

  3. 03
    Review

    Show exclusions and the date the source was last checked.