Free AI Pricing Tools

How much does AI really cost?

Calculate API costs for OpenAI, Claude, Gemini, GLM and Kimi. Compare prices before you commit.

OpenAI CalculatorGPT vs Claude
Latest
Google's Gemini 4 Argon goes GA at $2/$10 per million tokens until 30 November, then $4/$20Google retires Gemini 3.5 and 3.7 Flash; calls now route to 3.6 and 3.8 Flash at $0.75/$3.75Claude Haiku 5.5 launches at $0.10/$0.50 — a tenth of Haiku 4.5, with a surcharge above 100K tokensClaude Sonnet 5.5 keeps $2/$10 per million tokens — now exactly the price of GPT-6.1 SolOpenAI ships GPT-6 Sol and Luna at half the GPT-5.6 price: $2/$10 and $0.10/$0.50Claude Opus 5.5 arrives at $4/$20 per million tokens, 20% below Opus 5OpenAI opens GPT-6 Astra on the API at $10/$50 per million tokensClaude Fable 5.1 launches at $10/$50 per million tokens — 2x Opus 5, with a 75% cache-read cutHugging Face reportedly in talks to sell to Nvidia for ~$13B, months after rejecting its $500M offerGemini 3.7 Flash launches at roughly half the price of 3.5 Flash — introductory rate lasts through Dec 31, 2026OpenAI cuts GPT-5.6 Luna by 80% and Terra by 20% — Luna now $0.20/$1.20 per million tokensKimi K3 lands with a 1M-token context window at $3/$15 — see what actually fits in itGPT-5.6 family generally available on a 1.05M-token window: Sol, Terra and LunaClaude Sonnet 5 stays at promo $2/$10 until August 31, then reverts to $3/$15GLM-5.2 undercuts the frontier tier at $1.40/$4.40 per million tokens

Free Tools

Practical calculators for everyday AI costs — no signup, no cost.

OpenAI Cost Calculator

Estimate GPT-6 Astra, Sol and Luna monthly API costs.

Claude Cost Calculator

Calculate Anthropic API costs for Claude Fable, Opus, Sonnet and Haiku.

Token Calculator

Paste text to count tokens and see the cost across all models.

GPT vs Claude Cost

Direct side-by-side cost comparison for your usage pattern.

Popular

PDF Summary Cost

How much does it cost to summarize a 300-page PDF?

Context Window Calculator

How many pages, words or books fit in each model?

Popular

Pages in GPT/Claude

Quick answer: how many PDF pages fit in each context window?

Popular

GPU Cloud Cost Calculator

Compare H100, A100 and other AI GPU rental prices across 8 cloud providers.

20

models tracked

Weekly

prices updated

8

free tools

Popular Models

OpenAIContext: 1.05M tokens

GPT-6 Astra

Input: U$ 10.00/1MOutput: U$ 50.00/1M
OpenAIContext: 1.05M tokens

GPT-6.1 Sol

Input: U$ 2.00/1MOutput: U$ 10.00/1M
OpenAIContext: 1.05M tokens

GPT-6 Luna

Input: U$ 0.1000/1MOutput: U$ 0.5000/1M
AnthropicContext: 1M tokens

Claude Fable 5.1

Input: U$ 10.00/1MOutput: U$ 50.00/1M
AnthropicContext: 1M tokens

Claude Opus 5.5

Input: U$ 4.00/1MOutput: U$ 20.00/1M
AnthropicContext: 1M tokens

Claude Sonnet 5.5

Input: U$ 2.00/1MOutput: U$ 10.00/1M
AnthropicContext: 1M tokens

Claude Haiku 5.5

Input: U$ 0.1000/1MOutput: U$ 0.5000/1M
GoogleContext: 1.05M tokens

Gemini 4 Argon

Input: U$ 2.00/1MOutput: U$ 10.00/1M
GoogleContext: 1.05M tokens

Gemini 3.8 Flash

Input: U$ 0.7500/1MOutput: U$ 3.75/1M
Z.aiContext: 1M tokens

GLM-5.2

Input: U$ 1.40/1MOutput: U$ 4.40/1M
Moonshot AIContext: 1M tokens

Kimi K3

Input: U$ 3.00/1MOutput: U$ 15.00/1M
NVIDIAContext: 1M tokens

Nemotron 3 Ultra

Input: U$ 0.5000/1MOutput: U$ 2.20/1M
MetaContext: 1M tokens

Llama 4 Maverick

Input: U$ 0.2000/1MOutput: U$ 0.6000/1M

Latest Guides & Analysis

In-depth articles on AI API pricing, token optimization, and cost comparison.

View All Articles