I was building a cli tool that showed a graph of git commits, kind of like git log --graph, and deepseek v4 simply could not figure out a specific ui quirk where things weren't lining up correctly. I spent like $0.10 and 30 minutes trying to figure it out on deepseek.

Then I had deepseek summarize the bug, gave it to Opus, and it solved it in $1.12 and five minutes.