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Calcis: LLM Cost Estimator door Ryan Chen

See what your LLM prompt will cost before you send it. Works on ChatGPT, Claude, and Gemini.

Sommige functies kunnen betaling vereisenSommige functies kunnen betaling vereisen

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See the cost before you hit send.
Live estimate updates as you type, auto-detected GPT-5, no setup.

Same panel on Claude. And Gemini. And ChatGPT.
Switch models or sites. The overlay follows, costs recalculate.

Catches the expensive ones early.
2,400-token prompt? You'll know what it costs before it costs you.

One click for the full breakdown.
Input, output, total, model, effort. Every number, no guesswork.

Over deze extensie

Calcis shows you what an LLM API call will cost before you send it: right inside ChatGPT, Claude, and Gemini.

As you type a prompt, Calcis estimates the token count, predicts the output length, and shows the total cost in a small overlay near the input box. The estimate updates live as you type.

Features:
- Auto-detects which model you have selected
- Auto-detects effort/reasoning level
- Shows input tokens, predicted output tokens, and cost
- Shows cost at 1,000 requests/month for at-scale planning
- Works on chat.openai.com, chatgpt.com, claude.ai, gemini.google.com
- Non-intrusive overlay that can be collapsed or dismissed
- Your prompts are never stored or logged by the extension

Setup:
1. Get an API key at calcis.dev/dashboard
2. Click the Calcis extension icon and enter your API key
3. Open ChatGPT, Claude, or Gemini and start typing

Powered by the same estimation engine as calcis.dev.

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