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Plans

Gravellis AI, Docs and the live Observatory are free for everyone. Pay only for the premium AI models.

Test mode: no real money moves. Use card 4242 4242 4242 4242, any future date, any CVC.

Yearly: pay 10 months, get 12

Free

Visitor

No account needed

  • 15 messages a day on good free models
  • Live Observatory prices, weather and news

Gravellis account

Free, just sign in

  • 60 messages a day on Gravellis AI
  • 3 free Claude Sonnet messages a day (short chats)
  • Gravellis Docs, free: Word, Excel and PowerPoint in your browser
  • Docs AI on free models, 40 requests a day
  • Chats and your private vault saved to your account

Plans

ChatGPT Plus, Claude Pro and Google AI Pro cost about $20 a month each. AI Plus puts their premium models in one place for €7.99, paid by credits.

Credit packs

For when you run out. Pack credits never expire, and nothing tops up on its own.

Coming soon

What a credit is. A premium message costs at least: Claude Sonnet, GPT-6.1 Sol and Grok 1 credit, Gemini Pro and Claude Opus 2, Claude Fable 4, GPT-6 Astra 5. A long answer or a big file costs what the model really used: one credit is one cent of model time, about 750 words written by Sonnet. Free models never use credits.

Docs AI uses the same credits as the chat; an edit to a large document can take a few. Docs itself stays free.

Plan credits fill up each month and don't pile up. Pack credits are used after plan credits and never expire.

Prices are in euros and final: nothing is added at checkout. Plans renew automatically until you cancel. Cancel any time from Manage; your plan runs to the end of the period you paid for.

Your spending. Every plan, credit pack and eSIM you've bought, with receipts: see your spending.

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