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How to find the cheapest listed API for a model with Grandet

Ask your agent for the lowest listed price for a model, with the site, group, unit and observation date.

  • Top pick
  • Money
  • Beginner
  • 15 minutes
  • From the README
  • Claude Code
  • Codex
  • Cursor

Who it is forA developer paying for model API calls who needs the cheapest listed option for one model before committing budget.

The problemModel API prices differ across official APIs, inference providers and relay sites, and comparing them by hand takes time.

The outcomeA short list of the cheapest few listed options for your model, each with its source and observation date, ranked by listed price only.

What you need first

  • An AI agent you already use, such as Codex, Claude Code or Cursor
  • A model name or kind of use (chat, coding, long output) to compare
  • For connecting an API: a grandet.ai sign-up, a top-up and a token created in the group the site names

Steps

  1. Paste Install Grandet Skill for me: https://grandet.ai/download.md into your agent and let it finish the install.
  2. Open a new conversation and ask for the cheapest API for your model, for example: Find me the cheapest Claude Sonnet 4.6 API.
  3. Give your monthly token volume and input/output split if you want a monthly cost estimate.
  4. Check the listed site, group, price, unit and observation date before you act on any result.

Prompt for your agent

Using the Grandet Skill or the MCP server at https://grandet.ai/mcp, find the cheapest listed API for <model name>. Return the top three options with site, group, price, unit and observation date, and confirm that prices are shown in one currency unit only.

Caveat. Grandet ranks by listed price only and says nothing about quality, speed or downgraded models, so check that the option fits your needs.

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