I'm also experimenting with DeepSeek 4 and it seems on par. Its API price is much cheaper and it's top up, not a subscription. I still didn't consume the $2 I loaded on my account sometimes in June. However they about to charge double price in what seems to be China's morning and afternoon.

It builds bad will, that will have users say "fuck them" on the first chance they get.

Claude Code is good, but a lot of the cost is repo discovery: finding files, reading candidates, following imports, etc.

Fabric indexes the repo locally and gives Claude Code the relevant context up front. Nothing goes to HailMary.

Tiny early test on httpx: 58% lower API cost across 2 tasks, both passed tests.

Repo is here if anyone wants to try it or poke holes in it: https://github.com/hailmarylabs/fabric/