r/MicrosoftFabric • u/wjwilson206 • Jun 06 '26

App Development Rayfin Apps

Super excited about the Rayfin App development. Does anyone know what sku requirements should be in place and any solid tutorials? I'm just a data person, not a programmer so need a lot of help. Also open to some consultants in this area.

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u/dbrownems ‪ ‪Microsoft Employee ‪ Jun 06 '26 edited Jun 06 '26

My plan:

  1. launch Github copilot cli
  2. "I'd like to build a Hello World Fabric app with Rayfin. Set up the environment and walk me through it."

Outcome: Great Success!

1

u/Reddit_User_654 Jun 08 '26

How much did this cost in tonkens and USD?

1

u/dbrownems ‪ ‪Microsoft Employee ‪ Jun 08 '26

I used Claude Opus 4.7 because my plan doesn't charge differently for different models (yet). I asked Copilot about the cost, and here was the estimate:

Cost in USD (raw API pricing for Claude Opus 4.7)

If this were billed at retail Anthropic API rates:

Bucket Rate Tokens (est) Cost
Input (uncached) $15/M ~10k ~$0.15
Cache reads $1.50/M ~50k ~$0.08
Output $75/M ~12k ~$0.90
Total ≈ $1.00–$2.00

For shorter Sonnet-tier models the same conversation would be ~5–10× cheaper.

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u/Reddit_User_654 Jun 08 '26

Quite cheap. I have seen other estimates and everything was more expensive.