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Free Tools
Free AI Developer Tools
Open tools to help you estimate costs, count tokens, and optimize your AI workflows — no account required.
New
Prompt Cost Calculator
Paste your prompt, pick a model, and instantly see the token count and estimated cost. Supports OpenAI, Anthropic, Google Gemini, and xAI models.
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New
Context Window "Bloat" Simulator
See how naively appending every message to your chat history compounds input costs quadratically. Visualize value vs. waste tokens per turn.
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